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Journal of Geophysical Research: Atmospheres (1984–2012)

Cover image for Journal of Geophysical Research: Atmospheres (1984–2012)

27 August 2012

Volume 117, Issue D16

Currently known as: Journal of Geophysical Research: Atmospheres

  1. Aerosol and Clouds

    1. Top of page
    2. Aerosol and Clouds
    3. Climate and Dynamics
    4. Composition and Chemistry
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      An extended cumulative logit model for detecting a shift in frequencies of sky-cloudiness conditions

      QiQi Lu and Xiaolan L. Wang

      Version of Record online: 31 AUG 2012 | DOI: 10.1029/2012JD017893

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      Key Points

      • A statistical test is developed to identify a shift in cloud cover time series
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      Ice-cloud particle habit classification using principal components

      H. Lindqvist, K. Muinonen, T. Nousiainen, J. Um, G. M. McFarquhar, P. Haapanala, R. Makkonen and H. Hakkarainen

      Version of Record online: 28 AUG 2012 | DOI: 10.1029/2012JD017573

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      Key Points

      • An automated ice crystal shape classification tool (IC-PCA) was developed
      • The average classification accuracy of the IC-PCA is 81.1%
      • For radiative fluxes, the IC-PCA accuracy appears comparable to manual accuracy
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      The deposition ice nucleation and immersion freezing potential of amorphous secondary organic aerosol: Pathways for ice and mixed-phase cloud formation

      Bingbing Wang, Andrew T. Lambe, Paola Massoli, Timothy B. Onasch, Paul Davidovits, Douglas R. Worsnop and Daniel A. Knopf

      Version of Record online: 28 AUG 2012 | DOI: 10.1029/2012JD018063

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      Key Points

      • Amorphous secondary organic aerosol can act as efficient atmospheric ice nuclei
      • Water uptake and ice nucleation are governed by glass transition points
      • Glass transition points relevant for secondary organic aerosol are derived
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      Correction to “Evaluation of cloud-resolving model intercomparison simulations using TWP-ICE observations: Precipitation and cloud structure”

      Adam Varble, Ann M. Fridlind, Edward J. Zipser, Andrew S. Ackerman, Jean-Pierre Chaboureau, Jiwen Fan, Adrian Hill, Sally A. McFarlane, Jean-Pierre Pinty and Ben Shipway

      Version of Record online: 25 AUG 2012 | DOI: 10.1029/2012JD017963

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      Variability of aerosols in the tropical Atlantic Ocean relative to African Easterly Waves and their relationship with atmospheric and oceanic environments

      Manuel D. Zuluaga, Peter J. Webster and Carlos D. Hoyos

      Version of Record online: 23 AUG 2012 | DOI: 10.1029/2011JD017181

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      Key Points

      • Use satellite retrievals and reanalysis to investigate aerosol-environment relations
      • Investigate how 2 modes of AEW variability affect aerosol-environment relations
      • Present extensions to previous studies
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      Numerical simulation of saltating particles in atmospheric boundary layer over flat bed and sand ripples

      Ding Tong and Ning Huang

      Version of Record online: 21 AUG 2012 | DOI: 10.1029/2011JD017424

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      Key Points

      • The aeolian sand transport is a dynamic equilibrium process
      • The bed form play a very important part in the wind blown sand
      • The balance time and sand flux increased on the sand ripples
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      Characteristics of tropical cyclone precipitation features over the western Pacific warm pool

      Levi Thatcher, Yukari N. Takayabu, Chie Yokoyama and Zhaoxia Pu

      Version of Record online: 18 AUG 2012 | DOI: 10.1029/2011JD017351

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      Key Points

      • Midlevel PFs are more prevalent in TC environments versus the background tropics
      • Enhanced TC midlevel PFs occur in both convective and stratiform precipitation
      • TC PFs are not only enhanced around 5.5 km, but also from 6-9 km height
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      Aerosol optical properties retrieved from Sun photometer measurements over Shanghai, China

      Qianshan He, Chengcai Li, Fuhai Geng, Hequn Yang, Peiren Li, Tingting Li, Dongwei Liu and Zhen Pei

      Version of Record online: 18 AUG 2012 | DOI: 10.1029/2011JD017220

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      Key Points

      • A CIMEL sun photometer conducted continuous observations in the urban area
      • The characteristics of AOD, AE, SSA, size distribution, etc. was revealed
      • The results present significant implications for research on climate forcing
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      Aerosol effect on droplet spectral dispersion in warm continental cumuli

      G. Pandithurai, S. Dipu, Thara V. Prabha, R. S. Maheskumar, J. R. Kulkarni and B. N. Goswami

      Version of Record online: 17 AUG 2012 | DOI: 10.1029/2011JD016532

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      Key Points

      • Aerosols increase the relative dispersion of continental cumuli
      • Droplet dispersion offsets the cooling up to 39% in continental cumuli
      • AIE is lesser in sub-adiabatic clouds due to inhomogeneous mixing
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      On the effect of wind speed on submicron sea salt mass concentrations and source fluxes

      Jurgita Ovadnevaite, Darius Ceburnis, Manjula Canagaratna, Harald Berresheim, Jakub Bialek, Giovanni Martucci, Douglas R. Worsnop and Colin O'Dowd

      Version of Record online: 16 AUG 2012 | DOI: 10.1029/2011JD017379

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      Key Points

      • The HR-ToF-AMS is capable of quantitative submicron sea salt mass measurements
      • Different SSS functions were observed for increasing and decreasing wind fields
      • Existing SS source functions could lead to an overestimation of sea salt mass
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      An assessment of the surface longwave direct radiative effect of airborne dust in Zhangye, China, during the Asian Monsoon Years field experiment (2008)

      Richard A. Hansell, Si-Chee Tsay, N. Christina Hsu, Qiang Ji, Shaun W. Bell, Brent N. Holben, Ellsworth J. Welton, Ted L. Roush, W. Zhang, J. Huang, Zhanqing Li and H. Chen

      Version of Record online: 4 JUL 2012 | DOI: 10.1029/2011JD017370

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      Key Points

      • LW surface forcing at Zhangye is ~2X greater than that at Cape Verde
      • Strong dust absorption at Zhangye largely contributes to LW forcing
      • Over one-half of SW surface cooling at Zhangye is compensated by LW warming
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      SO2 over central China: Measurements, numerical simulations and the tropospheric sulfur budget

      Hao He, Can Li, Christopher P. Loughner, Zhanqing Li, Nickolay A. Krotkov, Kai Yang, Lei Wang, Youfei Zheng, Xiangdong Bao, Guoqiang Zhao and Russell R. Dickerson

      Version of Record online: 9 FEB 2012 | DOI: 10.1029/2011JD016473

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      Key Points

      • Tropospheric SO2 was measured by aircraft in spring 2008 over central China
      • OMI SO2 products (BRD and ISF algorithm) were validated
      • CMAQ model simulated and estimated export of sulfur compounds
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      Seasonal variations of aerosol optical properties, vertical distribution and associated radiative effects in the Yangtze Delta region of China

      Jianjun Liu, Youfei Zheng, Zhanqing Li, Connor Flynn and Maureen Cribb

      Version of Record online: 9 FEB 2012 | DOI: 10.1029/2011JD016490

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      Key Points

      • Aerosol radiative forcing is exceptionally strong
      • Vertical distribution of heating rate is revealed
      • Aerosols originate from a variety of sources
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      Aerosol impacts on clouds and precipitation in eastern China: Results from bin and bulk microphysics

      Jiwen Fan, L. Ruby Leung, Zhanqing Li, Hugh Morrison, Hongbin Chen, Yuquan Zhou, Yun Qian and Yuan Wang

      Version of Record online: 19 JAN 2012 | DOI: 10.1029/2011JD016537

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      Key Points

      • Aerosols significantly change the timing of storms and precipitation
      • Fixed CCN prescribed in Bulk is the reason for the suppressed convection by CCN
      • Suggestions for improving bulk microphsycis are provided
  2. Climate and Dynamics

    1. Top of page
    2. Aerosol and Clouds
    3. Climate and Dynamics
    4. Composition and Chemistry
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      Future changes and uncertainties in Asian precipitation simulated by multiphysics and multi–sea surface temperature ensemble experiments with high-resolution Meteorological Research Institute atmospheric general circulation models (MRI-AGCMs)

      Hirokazu Endo, Akio Kitoh, Tomoaki Ose, Ryo Mizuta and Shoji Kusunoki

      Version of Record online: 31 AUG 2012 | DOI: 10.1029/2012JD017874

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      Key Points

      • Precipitation increases consistently in East Asia and Bangladesh
      • Precipitation changes in South Asia and Southeast Asia have large uncertainty
      • The uncertainty comes from variation of cumulus schemes rather than SST patterns
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      Planetary boundary layer heights from GPS radio occultation refractivity and humidity profiles

      Chi O. Ao, Duane E. Waliser, Steven K. Chan, Jui-Lin Li, Baijun Tian, Feiqin Xie and Anthony J. Mannucci

      Version of Record online: 30 AUG 2012 | DOI: 10.1029/2012JD017598

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      Key Points

      • A global climatology of PBL heights was derived using 3 years of GPS RO data
      • The technique is most useful for sharp PBL tops over the subtropics
      • PBL heights from ECMWF Reanalysis were ~500 m lower almost everywhere
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      Snow cover and precipitation impacts on dry season streamflow in the Lower Mekong Basin

      B. I. Cook, A. R. Bell, K. J. Anchukaitis and B. M. Buckley

      Version of Record online: 30 AUG 2012 | DOI: 10.1029/2012JD017708

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      Key Points

      • Dry season streamflow in the Mekong is sensitive to snow and precipitation
      • Climate models predict divergent trends in these hydrologic inputs
      • Divergent climate trends lead to large uncertainty in streamflow projections
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      Interpretation of cloud structure anomalies over the tropical Pacific during the 1997/98 El Niño

      Moguo Sun, Robert D. Cess and Dave R. Doelling

      Version of Record online: 29 AUG 2012 | DOI: 10.1029/2011JD015861

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      Key Points

      • Changes of three cloud properties are highly correlated during 1998 El Nino
      • Radiative property changes are determined by all cloud properties
      • The strong El Nino can be used to test climate models
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      Why does the temperature rise faster in the arid region of northwest China?

      Baofu Li, Yaning Chen and Xun Shi

      Version of Record online: 29 AUG 2012 | DOI: 10.1029/2012JD017953

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      Key Points

      • Faster rise of annual temperature is mainly caused by winter temperature rising
      • The most important factor of winter temperature rising is Siberian High
      • The effect of Siberian High on temperature is greater than greenhouse gas's
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      The hindcast skill of the CMIP ensembles for the surface air temperature trend

      Koichi Sakaguchi, Xubin Zeng and Michael A. Brunke

      Version of Record online: 28 AUG 2012 | DOI: 10.1029/2012JD017765

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      Key Points

      • Surface air temperature trends from CMIP3 and 5 historical experiments are evaluated
      • Some improvements in CMIP5 for regional and decadal spatiotemporal scales
      • Predictive skills in the regional and decadal scales are still limited
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      Convective activity in Mato Grosso state (Brazil) from microwave satellite observations: Comparisons between AMSU and TRMM data sets

      Beatriz M. Funatsu, Vincent Dubreuil, Chantal Claud, Damien Arvor and Manoel A. Gan

      Version of Record online: 25 AUG 2012 | DOI: 10.1029/2011JD017259

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      Key Points

      • AMSU and TRMM microwave data have good match on regional convection depiction
      • Daily convection in Mato Grosso attains a maximum (minimum) at 1500 (0700) LT
      • A slight decrease in convective activity was found in the analyzed period
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      Correction to “Volcanic forcing of climate over the past 1500 years: An improved ice core-based index for climate models”

      Chaochao Gao, Alan Robock and Caspar Ammann

      Version of Record online: 25 AUG 2012 | DOI: 10.1029/2012JD018052

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      This article corrects:
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      A simple extension of “An alternative approach to sea surface aerodynamic roughness” by Zhiqiu Gao, Qing Wang, and Shouping Wang

      Zhiqiu Gao, Linlin Wang, Xueyan Bi, Qingtao Song and Yuchao Gao

      Version of Record online: 25 AUG 2012 | DOI: 10.1029/2012JD017478

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      Key Points

      • Extension of previous work
      • Using wave height instead of wave age
      • Turbulent transfer depends on wave status
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      Correction to “Genesis of twin tropical cyclones as revealed by a global mesoscale model: The role of mixed Rossby gravity waves”

      Bo-Wen Shen, Wei-Kuo Tao, Yuh-Lang Lin and Arlene Laing

      Version of Record online: 25 AUG 2012 | DOI: 10.1029/2012JD018598

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      This article corrects:
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      Half-century air temperature change above Antarctica: Observed trends and spatial reconstructions

      James A. Screen and Ian Simmonds

      Version of Record online: 25 AUG 2012 | DOI: 10.1029/2012JD017885

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      Key Points

      • Significant temperature changes above Antarctica over last half-century
      • Mid-troposphere has warmed in all seasons
      • Stratosphere has cooled, primarily in austral spring and summer
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      The summer North Atlantic Oscillation in CMIP3 models and related uncertainties in projected summer drying in Europe

      Ileana Bladé, Didac Fortuny, Geert Jan van Oldenborgh and Brant Liebmann

      Version of Record online: 25 AUG 2012 | DOI: 10.1029/2012JD017816

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      Key Points

      • Most CMIP3 models capture the precipitation impact of the SNAO in NW Europe
      • The simulated Mediterranean wet anomalies during the positive SNAO are too weak
      • The future CMIP3 SNAO trend is projected to be positive, but with a large spread
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      Expected future changes in the African monsoon between 2030 and 2070 using some CMIP3 and CMIP5 models under a medium-low RCP scenario

      Paul-Arthur Monerie, Bernard Fontaine and Pascal Roucou

      Version of Record online: 25 AUG 2012 | DOI: 10.1029/2012JD017510

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      Key Points

      • Analysis of the monsoon simulation from the CMIP3 to the CMIP5 models
      • Analysis of the West African monsoon changes through the RCP45 emission scenario
      • Study of the ARPI index and its evolution from the year 1900 to the year 2100
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      Trend estimation and change point detection in individual climatic series using flexible regression methods

      Bryson C. Bates, Richard E. Chandler and Adrian W. Bowman

      Version of Record online: 22 AUG 2012 | DOI: 10.1029/2011JD017077

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      Key Points

      • Trend and change detection is a very active field of research
      • Many existing techniques are restricted in their range of application
      • Our method allows for smooth trends, discontinuities, and model discrimination
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      A study of X-ray emissions from thunderstorms with emphasis on subsequent strokes in natural lightning

      S. Mallick, V. A. Rakov and J. R. Dwyer

      Version of Record online: 22 AUG 2012 | DOI: 10.1029/2012JD017555

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      Key Points

      • Subsequent leaders produce more X-rays than first ones
      • Individual photon energy may exceed 5 MeV
      • Runaway breakdown is not a necessary feature of leaders
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      An observationally based evaluation of cloud ice water in CMIP3 and CMIP5 GCMs and contemporary reanalyses using contemporary satellite data

      J.-L. F. Li, D. E. Waliser, W.-T. Chen, B. Guan, T. Kubar, G. Stephens, H.-Y. Ma, M. Deng, L. Donner, C. Seman and L. Horowitz

      Version of Record online: 21 AUG 2012 | DOI: 10.1029/2012JD017640

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      Key Points

      • A robust evaluation of the cloud ice water content for GCMs
      • Implications of this study on model representations of the Earth radiation
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      Dynamical downscaling of ECMWF Ensemble seasonal forecasts over East Africa with RegCM3

      G. T. Diro, A. M. Tompkins and X. Bi

      Version of Record online: 18 AUG 2012 | DOI: 10.1029/2011JD016997

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      Key Points

      • Dynamical downscaling of ECMWF ensemble seasonal hindcasts
      • The impact of lateral boundary condition on the performance of RegCM
      • Assessment of the skill of the seasonal hindcast from both ECMWF GCM and RegCM
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      The benefit of modeled ozone data for the reconstruction of a 99-year UV radiation time series

      J. Junk, U. Feister, A. Helbig, K. Görgen, E. Rozanov, J. W. Krzyścin and L. Hoffmann

      Version of Record online: 17 AUG 2012 | DOI: 10.1029/2012JD017659

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      Key Points

      • Successful reconstruction of a 99-year time series of daily erythemal UV totals
      • Reduced uncertainties in the reconstructed time series due to additional ozone
      • Significant trends in the reconstructed UV time series were detected
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      Growth of planetary waves and the formation of an elevated stratopause after a major stratospheric sudden warming in a T213L256 GCM

      Yoshihiro Tomikawa, Kaoru Sato, Shingo Watanabe, Yoshio Kawatani, Kazuyuki Miyazaki and Masaaki Takahashi

      Version of Record online: 17 AUG 2012 | DOI: 10.1029/2011JD017243

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      Key Points

      • Planetary waves cause eastward wind recovery in the 1st SSW recovery stage
      • Gravity waves control the stratopause height by their filtering in the 2nd stage
      • Polar-night jet in the 2nd stage strengthens via adjustment toward thermal wind
  3. Composition and Chemistry

    1. Top of page
    2. Aerosol and Clouds
    3. Climate and Dynamics
    4. Composition and Chemistry
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      Variations in water vapor continuum radiative transfer with atmospheric conditions

      D. Paynter and V. Ramaswamy

      Version of Record online: 29 AUG 2012 | DOI: 10.1029/2012JD017504

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      Key Points

      • Contribution of the water vapor continuum in different atmospheres
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      Interannual variability of H218O in precipitation over the Asian monsoon region

      Yasuhiro Ishizaki, Kei Yoshimura, Shinjiro Kanae, Masahide Kimoto, Naoyuki Kurita and Taikan Oki

      Version of Record online: 25 AUG 2012 | DOI: 10.1029/2011JD015890

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      Key Points

      • Interannual variability of water isotopes in precipitation
      • Use of water isotope as a large-scale atmospheric circulation index
      • Simulation of water isotope by an atmospheric general circulation model
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      A global single-sensor analysis of 2002–2011 tropospheric nitrogen dioxide trends observed from space

      P. Schneider and R. J. van der A

      Version of Record online: 25 AUG 2012 | DOI: 10.1029/2012JD017571

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      Key Points

      • Tropospheric NO2 levels are changing rapidly in some parts of the world
      • Satellite data provides excellent tool to monitor global changes in tropospheric NO2
      • Direct comparison of satellite NO2 to station observations of NO2 is challenging
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      Impact of uncertainties in atmospheric mixing on simulated UTLS composition and related radiative effects

      M. Riese, F. Ploeger, A. Rap, B. Vogel, P. Konopka, M. Dameris and P. Forster

      Version of Record online: 23 AUG 2012 | DOI: 10.1029/2012JD017751

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      Key Points

      • Assessment of radiative effects of mixing uncertainties
      • Sensitivity of water vapor and ozone to mixing uncertainties
      • Importance of quantitative process representation in UTLS
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      Validation of upper mesospheric and lower thermospheric temperatures measured by the Solar Occultation for Ice Experiment

      Michael H. Stevens, Lance E. Deaver, Mark E. Hervig, James M. Russell III, David E. Siskind, Patrick E. Sheese, Edward J. Llewellyn, Richard L. Gattinger, Josef Höffner and B. T. Marshall

      Version of Record online: 23 AUG 2012 | DOI: 10.1029/2012JD017689

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      Key Points

      • SOFIE temperatures are validated between 15-88 km
      • SOFIE temperatures are biased high between 88-95 km
      • Uncertain atomic oxygen densities between 88-95 km could explain high bias
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      Constraining recent lead pollution sources in the North Pacific using ice core stable lead isotopes

      B. H. Gross, K. J. Kreutz, E. C. Osterberg, J. R. McConnell, M. Handley, C. P. Wake and K. Yalcin

      Version of Record online: 22 AUG 2012 | DOI: 10.1029/2011JD017270

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      Key Points

      • New ice core record of Pb concentration and Pb isotopes from the North Pacific
      • Pb isotope ratios rule out European pollution in this part of the North Pacific
      • Increasing Asian and decreasing North American pollution with elevation
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      High precision, absolute total column ozone measurements from the Pandora spectrometer system: Comparisons with data from a Brewer double monochromator and Aura OMI

      Maria Tzortziou, Jay R. Herman, Alexander Cede and Nader Abuhassan

      Version of Record online: 22 AUG 2012 | DOI: 10.1029/2012JD017814

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      Key Points

      • Pandora revealed short-term changes in TCO not possible to capture by OMI alone
      • Pandora TCO retrievals are of comparable accuracy to the widely accepted Brewer
      • Very good agreement between Pandora and satellite Aura-OMI retrievals
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      Understanding differences in upper stratospheric ozone response to changes in chlorine and temperature as computed using CCMVal-2 models

      A. R. Douglass, R. S. Stolarski, S. E. Strahan and L. D. Oman

      Version of Record online: 18 AUG 2012 | DOI: 10.1029/2012JD017483

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      Key Points

      • Difference among models for ozone response follows from understanding
      • Simulated unperturbed state for T, ozone and NOy is important
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      Formation of stratospheric nitric acid by a hydrated ion cluster reaction: Implications for the effect of energetic particle precipitation on the middle atmosphere

      O.-K. Kvissel, Y. J. Orsolini, F. Stordal, I. S. A. Isaksen and M. L. Santee

      Version of Record online: 17 AUG 2012 | DOI: 10.1029/2011JD017257

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      Key Points

      • Production of HNO3 by conversion of N2O5 upon hydrated ion clusters
      • Improved seasonal evolution of HNO3 compared to MLS observations
      • Feedbacks involving O3 lead to a weaker polar vortex in spring and summer
    10. You have free access to this content
      Emission characteristics of black carbon in anthropogenic and biomass burning plumes over California during ARCTAS-CARB 2008

      L. K. Sahu, Y. Kondo, N. Moteki, N. Takegawa, Y. Zhao, M. J. Cubison, J. L. Jimenez, S. Vay, G. S. Diskin, A. Wisthaler, T. Mikoviny, L. G. Huey, A. J. Weinheimer and D. J. Knapp

      Version of Record online: 17 AUG 2012 | DOI: 10.1029/2011JD017401

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      Key Points

      • Distributions of black carbon over California during NASA ARCTAS-CARB mission
      • Emission ratios of aerosols from anthropogenic and biomass burning sources
      • Study of microphysical properties of aerosols emitted from different sources

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