Journal of Geophysical Research: Atmospheres (1984–2012)

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

27 May 2011

Volume 116, Issue D10

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
    1. A downward positive leader that radiated optical pulses like a negative stepped leader

      D. Wang and N. Takagi

      Article first published online: 24 MAY 2011 | DOI: 10.1029/2010JD015391

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      Key Points

      • The first high-speed optical recording of a downward positive stepped leader
      • The characteristics of leader step optical pulses have been revealed
      • Leader step optical pulses propagate backward at roughly 1/3 light speed
    2. A 17 month climatology of the cloud condensation nuclei number concentration at the high alpine site Jungfraujoch

      Z. Jurányi, M. Gysel, E. Weingartner, N. Bukowiecki, L. Kammermann and U. Baltensperger

      Article first published online: 24 MAY 2011 | DOI: 10.1029/2010JD015199

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      Key Points

      • Characterization of the seasonal cycle of the CCN concentration at Jungfraujoch
      • No seasonal cycle of the supersaturation-dependent CCN activation diameter
      • Long-term CCN concentration prediction from time-resolved size distribution
    3. Sulfate formation in atmospheric ultrafine particles at Canadian inland and coastal rural environments

      X. H. Yao and L. Zhang

      Article first published online: 21 MAY 2011 | DOI: 10.1029/2010JD015315

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      Key Points

      • Sulfate formation from nucleation events was evident at several rural locations
      • Growth mechanisms of ultrafine particles were investigated
      • Differences and similarities between in-land and coastal sites were explored
    4. Solar spectral absorption by marine stratus clouds: Measurements and modeling

      Bruce C. Kindel, Peter Pilewskie, K. Sebastian Schmidt, Odele Coddington and Michael D. King

      Article first published online: 21 MAY 2011 | DOI: 10.1029/2010JD015071

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      Key Points

      • Measurements and modeling of cloud absorptance are in good agreement
      • New method of aircraft cloud absorption measurement is presented
      • Spectral effects of absorbing aerosols on cloud absorption is demonstrated
    5. Sun-sky radiometer–derived column-integrated aerosol optical and physical properties over a tropical urban station during 2004–2009

      Sumit Kumar, P. C. S. Devara, K. K. Dani, S. M. Sonbawne and S. K. Saha

      Article first published online: 21 MAY 2011 | DOI: 10.1029/2010JD014944

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      Key Points

      • Long-term aerosol characterization over urban region
      • Role of aerosols in environmental pollution
      • Impact of aerosols on regional/global climate
  2. Climate and Dynamics

    1. Top of page
    2. Aerosol and Clouds
    3. Climate and Dynamics
    4. Composition and Chemistry
    1. Depth-based multivariate descriptive statistics with hydrological applications

      F. Chebana and T. B. M. J. Ouarda

      Article first published online: 28 MAY 2011 | DOI: 10.1029/2010JD015338

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      Key Points

      • Methodology development
      • Applications (2 case studies)
      • Appendix
    2. The aerosol–Bénard cell effect on marine stratocumulus clouds and its contribution to glacial-interglacial cycles

      R. Z. Bar-Or, H. Gildor and C. Erlick

      Article first published online: 28 MAY 2011 | DOI: 10.1029/2010JD014470

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      Key Points

      • We investigated a new radiative forcing called the aerosol–Benard cell effect
      • Alone the aerosol–Benard cell effect contributes a negative radiative forcing
      • The total effect of dust is a larger glacial-interglacial temperature amplitude
    3. Revisiting the trend of the tropical and subtropical Pacific surface latent heat flux during 1977–2006

      Gen Li, Baohua Ren, Chengyun Yang and Jianqiu Zheng

      Article first published online: 27 MAY 2011 | DOI: 10.1029/2010JD015444

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      Key Points

      • SST warming is the primary direct/local cause of the surface LHF trend
      • Surface wind speed strengthening is an important indirect/nonlocal factor
      • Coherent upward trends should be closely linked to global warming
    4. A study on the formation and trend of the Brewer-Dobson circulation

      K. Okamoto, K. Sato and H. Akiyoshi

      Article first published online: 27 MAY 2011 | DOI: 10.1029/2010JD014953

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      Key Points

      • The importance of GWD on the formation of the BDC
      • The importance of GWD on the trend of the BDC
      • The impact of the GHG increase on the GWD
    5. Tropical Australian climate and the Australian monsoon as simulated by 23 CMIP3 models

      R. A. Colman, A. F. Moise and L. I. Hanson

      Article first published online: 27 MAY 2011 | DOI: 10.1029/2010JD015149

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      Key Points

      • Australian monsoon as simulated by models systematically examined
      • Mean model simulation shows skill but very large variation between models
    6. Analyzing precipitation projections: A comparison of different approaches to climate model evaluation

      N. Schaller, I. Mahlstein, J. Cermak and R. Knutti

      Article first published online: 27 MAY 2011 | DOI: 10.1029/2010JD014963

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      Key Points

      • Multimodel mean does not outperform individual models for the defined metrics
      • Uncertainty in precipitation projections is not reduced by selecting best models
      • Internal variability contributes partly to lack of agreement in projections
    7. Is the recorded increase in short-duration North Atlantic tropical storms spurious?

      Gabriele Villarini, Gabriel A. Vecchi, Thomas R. Knutson and James A. Smith

      Article first published online: 26 MAY 2011 | DOI: 10.1029/2010JD015493

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      Key Points

      • Examination of whether the number of short-lived tropical storms is spurious
      • Shorties are likely to be very inflated by observing system changes over time
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    9. Spectral kernel approach to study radiative response of climate variables and interannual variability of reflected solar spectrum

      Zhonghai Jin, Bruce A. Wielicki, Constantin Loukachine, Thomas P. Charlock, David Young and Stefan Noël

      Article first published online: 26 MAY 2011 | DOI: 10.1029/2010JD015228

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      Key Points

      • Solar spectral radiative kernels are introduced
      • The kernels are used to decompose/analyze interannual variability
      • Variability of mean reflectance over large time/space scale is studied
    10. High-resolution wind and temperature observations from aircraft tracked by Mode-S air traffic control radar

      S. de Haan

      Article first published online: 25 MAY 2011 | DOI: 10.1029/2010JD015264

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      Key Points

      • Wind and temperature can be inferred from all aircraft close to an airport
      • The wind observations are of good quality compared to AMDAR
      • The observation frequency in space and time is very high
    11. Observed trends in indices of daily and extreme temperature and precipitation for the countries of the western Indian Ocean, 1961–2008

      L. A. Vincent, E. Aguilar, M. Saindou, A. F. Hassane, G. Jumaux, D. Roy, P. Booneeady, R. Virasami, L. Y. A. Randriamarolaza, F. R. Faniriantsoa, V. Amelie, H. Seeward and B. Montfraix

      Article first published online: 24 MAY 2011 | DOI: 10.1029/2010JD015303

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      Key Points

      • A workshop on climate change indices was held in Mauritius
      • This paper reports on trends in daily and extremes temperature and indices
      • The results show a warming and no strong evidence of change in precipitation
    12. Model-simulated humidity bias in the upper troposphere and its relation to the large-scale circulation

      Eui-Seok Chung, Brian J. Soden, Byung-Ju Sohn and Johannes Schmetz

      Article first published online: 24 MAY 2011 | DOI: 10.1029/2011JD015609

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      Key Points

      • Investigation of the depiction of upper tropospheric water vapor in models
      • Model-simulated humidity bias in the upper troposphere
      • Relation of model-simulated humidity bias to large-scale circulation
    13. CLARREO shortwave observing system simulation experiments of the twenty-first century: Simulator design and implementation

      Daniel R. Feldman, Chris A. Algieri, Jonathan R. Ong and William D. Collins

      Article first published online: 24 MAY 2011 | DOI: 10.1029/2010JD015350

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      Key Points

      • This observing system simulation is useful for CLARREO mission development
      • This shortwave climate OSSE indicates the spectral signatures of climate change
      • Climate forcings and feedbacks produce distinct shortwave reflectance signatures
    14. The influence of surface versus free-air decoupling on temperature trend patterns in the western United States

      N. C. Pepin, C. Daly and J. Lundquist

      Article first published online: 24 MAY 2011 | DOI: 10.1029/2010JD014769

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      Key Points

      • Climate change varies locally
      • Surface versus free-air decoupling can influence future climate change
      • Spatial scale is critical in mountain climate change
    15. Assessments of FY-3A Microwave Humidity Sounder measurements using NOAA-18 Microwave Humidity Sounder

      L. Guan, X. Zou, F. Weng and G. Li

      Article first published online: 24 MAY 2011 | DOI: 10.1029/2010JD015412

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      Key Points

      • Fengyun-3A MWHS
      • Observation assessment
    16. Trend analysis of surface cloud-free downwelling long-wave radiation from four Swiss sites

      S. Wacker, J. Gröbner, K. Hocke, N. Kämpfer and L. Vuilleumier

      Article first published online: 21 MAY 2011 | DOI: 10.1029/2010JD015343

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      Key Points

      • Significant increase of cloud-free downwelling long-wave radiation
      • Consistency of corresponding temperature and humidity trends
      • Indication for a long-term change in high-level clouds
    17. Influence of the annual cycle of sea surface temperature on the monsoon onset

      Xingwen Jiang and Jianping Li

      Article first published online: 21 MAY 2011 | DOI: 10.1029/2010JD015236

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      Key Points

      • Abrupt northward jump of warmest SST axis leads the monsoon onset
    18. Simultaneously measured current, luminosity, and electric field pulses in a rocket-triggered lightning flash

      Xiushu Qie, Rubin Jiang, Caixia Wang, Jing Yang, Junfang Wang and Dongxia Liu

      Article first published online: 20 MAY 2011 | DOI: 10.1029/2010JD015331

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      Key Points

      • Thirty-one current pulses of an artificially triggered lightning were analyzed
      • Comparison of return stroke, typical M components, and large M and RM events
      • Two branches would exist in the upper part of the discharge channel
    19. Impact of intermittent spectral nudging on regional climate simulation using Weather Research and Forecasting model

      Dong-Hyun Cha, Chun-Sil Jin, Dong-Kyou Lee and Ying-Hwa Kuo

      Article first published online: 20 MAY 2011 | DOI: 10.1029/2010JD015069

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      Key Points

      • Impact of intermittent spectral nudging on regional climate simulation
    20. Momentum budget of the atmospheric boundary layer over the Greenland ice sheet and its surrounding seas

      J. H. van Angelen, M. R. van den Broeke and W. J. van de Berg

      Article first published online: 18 MAY 2011 | DOI: 10.1029/2010JD015485

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      Key Points

      • Momentum budget over the Greenland ice sheet explicitly solved
      • Indicated persistent northerly flow along NE coast of Greenland
      • Interaction between katabatic and large-scale forcing over the western GrIS
  3. Composition and Chemistry

    1. Top of page
    2. Aerosol and Clouds
    3. Climate and Dynamics
    4. Composition and Chemistry
    1. You have free access to this content
      Correction to “Comparing upper tropospheric humidity data from microwave satellite instruments and tropical radiosondes”

      Isaac Moradi, Stefan A. Buehler, Viju O. John and Salomon Eliasson

      Article first published online: 27 MAY 2011 | DOI: 10.1029/2011JD015962

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      This article corrects:
    2. Free tropospheric ozone changes over Europe as observed at Jungfraujoch (1990–2008): An analysis based on backward trajectories

      J. Cui, S. Pandey Deolal, M. Sprenger, S. Henne, J. Staehelin, M. Steinbacher and P. Nédélec

      Article first published online: 24 MAY 2011 | DOI: 10.1029/2010JD015154

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      Key Points

      • Ozone at Jungfraujoch in 1990–2008 was investigated
      • Ozone trends shift from positive in 1990s to no significant trends afterward
      • Trends in individual source regions show similar pattern
    3. Thermodynamic state retrieval from microwave occultation data and performance analysis based on end-to-end simulations

      S. Schweitzer, G. Kirchengast, M. Schwaerz, J. Fritzer and M. E. Gorbunov

      Article first published online: 18 MAY 2011 | DOI: 10.1029/2010JD014850

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      Key Points

      • New retrieval algorithm for LEO-LEO microwave occultation (LMO) data
      • Accuracy of profiles: pressure < 0.2 %, temperature < 0.5 K, humidity < 10 %
      • Encouraging for LMO implementation (also combined with IR laser occultation)
    4. Evaluation of radiation scheme performance within chemistry climate models

      Piers M. Forster, Victor I. Fomichev, Eugene Rozanov, Chiara Cagnazzo, Andreas I. Jonsson, Ulrike Langematz, Boris Fomin, Michael J. Iacono, Bernhard Mayer, Eli Mlawer, Gunnar Myhre, Robert W. Portmann, Hideharu Akiyoshi, Victoria Falaleeva, Nathan Gillett, Alexey Karpechko, Jiangnan Li, Perrine Lemennais, Olaf Morgenstern, Sophie Oberländer, Michael Sigmond and Kiyotaka Shibata

      Article first published online: 18 MAY 2011 | DOI: 10.1029/2010JD015361

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      Key Points

      • Test of radiation schemes
      • Projection of stratospheric temperatures
      • Comparison with line-by-line models
    5. Diurnal and seasonal variability of surface ozone and NOx at a tropical coastal site: Association with mesoscale and synoptic meteorological conditions

      Liji Mary David and Prabha R. Nair

      Article first published online: 18 MAY 2011 | DOI: 10.1029/2010JD015076

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      Key Points

      • Association of diurnal variation with mesoscale circulation
      • Association of seasonal variation with synoptic wind pattern
      • Inter-dependence between ozone and NOx
    6. In situ measurements of tropospheric volcanic plumes in Ecuador and Colombia during TC4

      S. A. Carn, K. D. Froyd, B. E. Anderson, P. Wennberg, J. Crounse, K. Spencer, J. E. Dibb, N. A. Krotkov, E. V. Browell, J. W. Hair, G. Diskin, G. Sachse and S. A. Vay

      Article first published online: 10 MAY 2011 | DOI: 10.1029/2010JD014718

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