scholarly journals Atmospheric moisture budget and its regulation on the variability of summer precipitation over the Tibetan Plateau

2017 ◽  
Vol 122 (2) ◽  
pp. 614-630 ◽  
Author(s):  
Ziqian Wang ◽  
Anmin Duan ◽  
Song Yang ◽  
Kalim Ullah
Keyword(s):  
Tibetan Plateau ◽  
Summer Precipitation ◽  
The Tibetan Plateau ◽  
Moisture Budget ◽  
Atmospheric Moisture ◽  
Atmospheric Moisture Budget

scholarly journals Atmospheric Thermal and Dynamic Vertical Structures of Summer Hourly Precipitation in Jiulong of the Tibetan Plateau

Atmosphere ◽  
2021 ◽  
Vol 12 (4) ◽  
pp. 505
Author(s):  
Yonglan Tang ◽  
Guirong Xu ◽  
Rong Wan ◽  
Xiaofang Wang ◽  
Junchao Wang ◽  
...  
Keyword(s):  
Wind Speed ◽  
Tibetan Plateau ◽  
Precipitation Amount ◽  
Summer Precipitation ◽  
The Tibetan Plateau ◽  
Hourly Precipitation ◽  
Air Convection ◽  
Precipitation Variation ◽  
Long Term Observation

It is an important to study atmospheric thermal and dynamic vertical structures over the Tibetan Plateau (TP) and their impact on precipitation by using long-term observation at representative stations. This study exhibits the observational facts of summer precipitation variation on subdiurnal scale and its atmospheric thermal and dynamic vertical structures over the TP with hourly precipitation and intensive soundings in Jiulong during 2013–2020. It is found that precipitation amount and frequency are low in the daytime and high in the nighttime, and hourly precipitation greater than 1 mm mostly occurs at nighttime. Weak precipitation during the daytime may be caused by air advection, and strong precipitation at nighttime may be closely related with air convection. Both humidity and wind speed profiles show obvious fluctuation when precipitation occurs, and the greater the precipitation intensity, the larger the fluctuation. Moreover, the fluctuation of wind speed is small in the morning, large at noon and largest at night, presenting a similar diurnal cycle to that of convective activity over the TP, which is conductive to nighttime precipitation. Additionally, the inverse layer is accompanied by the inverse humidity layer, and wind speed presents multi-peaks distribution in its vertical structure. Both of these are closely related with the underlying surface and topography of Jiulong. More studies on physical mechanism and numerical simulation are necessary for better understanding the atmospheric phenomenon over the TP.

Atmospheric moisture budget in the Arctic based on the ERA-40 reanalysis

2009 ◽  
Vol 30 (14) ◽  
pp. 2175-2194 ◽  
Author(s):  
Erko Jakobson ◽  
Timo Vihma
Keyword(s):  
The Arctic ◽  
Moisture Budget ◽  
Atmospheric Moisture ◽  
Atmospheric Moisture Budget

Improvement of summer precipitation simulation in China by assimilating spring soil moisture over the Tibetan Plateau

2021 ◽  
Author(s):  
Jiali Shen ◽  
Kechen Li ◽  
Zhiqiang Cui ◽  
Feimin zhang ◽  
Kai Yang ◽  
...  
Keyword(s):  
Soil Moisture ◽  
Tibetan Plateau ◽  
Summer Precipitation ◽  
The Tibetan Plateau ◽  
Precipitation Simulation

scholarly journals IMPACT OF TIBETAN PLATEAU SNOW COVER ON ABRUPT INTERDECADAL PRECIPITATION CHANGE OVER THE INDOCHINA PENINSULA IN THE MID-1990S

2019 ◽  
Vol XLII-3/W9 ◽  
pp. 57-62
Author(s):  
Y. Ha ◽  
Y. M. Zhu ◽  
Y. J. Hu ◽  
Z. Zhong
Keyword(s):  
Tibetan Plateau ◽  
Snow Cover ◽  
Summer Precipitation ◽  
Tropical Indian Ocean ◽  
Western Pacific Subtropical High ◽  
Precipitation Change ◽  
Interdecadal Change ◽  
Northwestern Pacific ◽  
The Tibetan Plateau ◽  
Indochina Peninsula

Abstract. Abrupt interdecadal changes in summer precipitation (May – September) over the Indochina Peninsula in the past 40 years have been investigated based on the NCEP-NCAR reanalysis product over 1979–2013 and multiple precipitation datasets. The mechanism for the abrupt change is explored. Results indicate that an abrupt interdecadal change in summer precipitation over the Indochina Peninsula occurred in the middle 1990s, and the annual mean summer precipitation during 1994–2002 increased by about 10% compared to that during 1982–1993. The most significant precipitation change occurred in the central and northern peninsula. Further analysis reveals that the interdecadal decrease in snow cover over the Tibetan Plateau in the winter and spring contributed to the summer precipitation increase over the Indochina Peninsula. The decrease in snow cover over the Tibetan Plateau actually increased the thermal contrast between the Tibetan Plateau and the tropical Indian Ocean-northwestern Pacific, leading to intensified summer monsoon over the northwestern Pacific and the South China Sea. As a result, westerly anomalies occurred from the Bay of Bengal to the northwestern Pacific, while anomalous cyclonic circulation prevailed in the upper levels above East Asia. Correspondingly, the western Pacific subtropical high weakened and shifted eastward. Under the joint effects of the above circulation patterns, the atmosphere became wetter in the Indochina Peninsula and summer precipitation increased. Results of the present study provide a theoretical basis for the prediction of long-term summer precipitation change in the Indochina Peninsula.

scholarly journals Arctic and Antarctic precipitation simulations produced by the NCAR community climate models

1995 ◽  
Vol 21 ◽  
pp. 117-122 ◽  
Author(s):  
David H. Bromwich ◽  
Biao Chen ◽  
Ren-Yow Tzeng
Keyword(s):  
Moisture Transport ◽  
Climate Models ◽  
Climate Model ◽  
Polar Regions ◽  
Moisture Budget ◽  
Atmospheric Moisture ◽  
Atmospheric Moisture Budget ◽  
Antarctic Precipitation ◽  
Climatic Characteristics ◽  
Community Climate

Precipitation predictions from globai-climate models (GCMs) for the ice-covered Arctic Ocean and the ice sheets of Antarctica are among the most important aspects of the inferred response of the polar areas to climate change. It is generally recognized that the atmospheric hydrologic cycle, which includes precipitation as a key part, is one of the components of the climate system that GCMs do not handle particularly well. The present-day atmospheric-moisture budget poleward of 70° latitude in both hemispheres, as represented by two versions of the NCAR (U.S. National Center for Atmospheric Research) community climate model (CCM1 and CCM2), is compared with observational analyses. The quantities examined on the seasonal and annual timescales are precipitation, evaporation/sublimation and atmospheric poleward moisture transport. The results are discussed in terms of the physiographic and climatic characteristics of both polar regions and how the particular models handle moisture transport: CCM1 uses the positive-moisture fixer and CCM2 the semi- Lagrangian transport. A particularly important test both for models and for observations is the degree to which the independently determined moisture-budget quantities actually balance. Deficiencies of both observations and models are discussed.

Spatially coherent clusters of summer precipitation extremes in the Tibetan Plateau: Where is the moisture from?

2020 ◽  
Vol 237 ◽  
pp. 104841 ◽  
Author(s):  
Yingzhao Ma ◽  
Mengqian Lu ◽  
Cameron Bracken ◽  
Haonan Chen
Keyword(s):  
Tibetan Plateau ◽  
Summer Precipitation ◽  
Precipitation Extremes ◽  
The Tibetan Plateau

scholarly journals Estimating Summer Precipitation Over the Tibetan Plateau With Geostatistics and Remote Sensing

2013 ◽  
Vol 33 (4) ◽  
pp. 424-436 ◽  
Author(s):  
Shi-Guang Xu ◽  
Zheng Niu ◽  
Da Kuang ◽  
Yan Shen ◽  
Wen-Jiang Huang ◽  
...  
Keyword(s):  
Remote Sensing ◽  
Tibetan Plateau ◽  
Summer Precipitation ◽  
The Tibetan Plateau
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