Atmospheric water budget over the western Himalayas in a regional climate model

August 2012
Journal of Earth System Science;Aug2012, Vol. 121 Issue 4, p963
Academic Journal
During winter months (December, January, February - DJF), the western Himalayas (WH) receive precipitation from eastward moving extratropical cyclones, called western disturbances (WDs) in Indian parlance. Winter precipitation-moisture convergence-evaporation (P-C-E) cycle is analyzed for a period of 22 years (1981-2002: 1980(D)-1981(J, F) to 2001(D)-2002(J, F)) with observed and modelled (RegCM3) climatological estimates over WH. Remarkable model skills have been observed in depicting the hydrological cycle over WH. Although precipitation biases exist, similar spatial precipitation with well marked two maxima is simulated by the model. As season advances, temporal distribution shows higher precipitation in simulation than the observed. However, P-C-E cycle shows similar peaks of moisture convergence and evaporation in daily climatologies though with varying maxima/minima. In the first half of winter, evaporation over WH is mainly driven by ground surface and 2 m air temperature. Lowest temperatures during mid-winter correspond to lowest evaporation to precipitation ratio as well.


Related Articles

  • On the Suitability of GCM Runoff Fields for River Discharge Modeling: A Case Study Using Model Output from HadGEM2 and ECHAM5. Weiland, F. C. Sperna; van Beek, L. P. H.; Kwadijk, J. C. J.; Bierkens, M. F. P. // Journal of Hydrometeorology;Feb2012, Vol. 13 Issue 1, p140 

    The representation of hydrological processes in land surface schemes (LSSs) has recently been improved. In this study, the usability of GCM runoff for river discharge modeling is evaluated by validating the mean, timing, and amplitude of the modeled annual discharge cycles against observations....

  • Performance of ENSEMBLES regional climate models over Central Europe using various metrics. Holtanová, Eva; Mikšovský, Jiří; Kalvová, Jaroslava; Pišoft, Petr; Motl, Martin // Theoretical & Applied Climatology;May2012, Vol. 108 Issue 3-4, p463 

    We show the evaluation of ENSEMBLES regional climate models (RCMs) driven by reanalysis ERA40 over a region centered at the Czech Republic. Attention is paid especially to the model ALADIN-CLIMATE/CZ, being used as the basis of the new climate change scenarios simulation for the Czech Republic....

  • Bulgarian mountains air temperatures and precipitation-statistical downscaling of global climate models and some projections. Nojarov, Peter // Theoretical & Applied Climatology;Dec2012, Vol. 110 Issue 4, p631 

    Measured air temperature and precipitation data from three high mountainous Bulgarian stations were used along with data from 18 global climate models (GCMs). Air temperature and precipitation outputs of preindustrial control experiment were compared with actually observed values. GCM with the...

  • The isotopic composition of precipitation from a winter storm -- a case study with the limited-area model COSMOiso. Pfahl, S.; Wernli, H.; Yoshimura, K.; Dubey, M. K. // Atmospheric Chemistry & Physics;2012, Vol. 12 Issue 3, p1629 

    Stable water isotopes are valuable tracers of the atmospheric water cycle, and potentially provide useful information also on weather-related processes. In order to further explore this potential, the water isotopes Due to image rights restrictions, multiple line equation(s) cannot be...

  • Impact of doubled CO2 on the interaction between the global and regional water cycles in four study regions. Zhao Li; Bhatt, Uma; Mölders, Nicole // Climate Dynamics;Feb2008, Vol. 30 Issue 2/3, p255 

    Results from a suite of 30-year simulations (after spin-up) of the fully coupled Community Climate System Model version 2.0.1 are analyzed to examine the impact of doubling CO2 on interactions between the global water cycle and the regional water cycles of four similar-size, but hydrologically...

  • Assessing the Performance of Multiple Regional Climate Model Simulations for Seasonal Mountain Snow in the Upper Colorado River Basin. Salzmann, Nadine; Mearns, Linda O. // Journal of Hydrometeorology;Apr2012, Vol. 13 Issue 2, p539 

    This study assesses the performance of the regional climate model (RCM) simulations from the North American Regional Climate Change Assessment Program (NARCCAP) for the Upper Colorado River basin (UCRB), U.S. Rocky Mountains. The UCRB is a major contributor to the Colorado River's runoff. Its...

  • Evaluation of the Hydrological Cycle in the ECHAM5 Model. Hagemann, Stefan; Arpe, Klaus; Roeckner, Erich // Journal of Climate;Aug2006, Vol. 19 Issue 16, p3810 

    This study investigates the impact of model resolution on the hydrological cycle in a suite of model simulations using a new version of the Max Planck Institute for Meteorology atmospheric general circulation model (AGCM). Special attention is paid to the evaluation of precipitation on the...

  • Northern Hemisphere storminess in the Norwegian Earth System Model (NorESM1-M). Knudsen, E. M.; Walsh, J. E. // Geoscientific Model Development Discussions;2014, Vol. 7 Issue 6, p8975 

    Metrics of storm activity in Northern Hemisphere high- and midlatitudes are evaluated from historical output and future projections by the Norwegian Earth System Model (NorESM1-M) coupled global climate model. The European Re-Analysis Interim (ERA- Interim) and the Community Climate System Model...

  • Projected change in East Asian summer monsoon precipitation under RCP scenario. Chen, Huopo; Sun, Jianqi // Meteorology & Atmospheric Physics;Jul2013, Vol. 121 Issue 1/2, p55 

    Future changes in East Asian summer monsoon precipitation climatology, frequency, and intensity are analyzed using historical climate simulations and future climate simulations under the RCP4.5 scenario using the World Climate Research Programme's (WCRP) Coupled Model Intercomparison Project 5...


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics