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Influences of Different Grades Precipitation on the Drought Release in Alpine Grassland
LI Hongmei, LI Lin, XIAO Hongbin, ZHANG Tiaofeng
Journal of Arid Meteorology, 2019 37 (1): 21
Based on the data of precipitation and soil volumetric water content per 10 minutes from March 1 to October 31, 2017, the effects of different precipitation levels on soil volumetric water content under different treatments were analyzed. The results are as follows: (1) Under light rain condition, the soil moisture at the 0-10 cm depth increased, and it was obviously weakened when the shielding rate exceeded 30%. The surface vegetation cover could improve the utilization rate of precipitation in a certain degree under light rain. (2) Moderate rain could improve the soil moisture at the 0-10 cm depth in the contrast area and under the treatments with shielding rate of 20% and 30% and the cond. . .
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Multi-data Intercomparison of Soil Moisture over China
LIU Liwei, WEI Dong, WANG Xiaowei, CHENG Shanjun
Journal of Arid Meteorology, 2019 37 (1): 47
The applicability of five sets of widely-used soil moisture data (EAR-Interim, NCEP reanalysis data, GLADS assimilation data, CPC assimilation data and inversion data derived AMSR-E) was inspected by using the observation data over China during 1992-2012, and the spatial distribution and change tendency of soil moisture over China were analyzed. The results show that these five sets of moisture data could generally reflect distribution pattern of wet in the southeast and dry in the northwest and the tendency of soil moisture decreased from the southeast to the northwest, while soil in arid and semi-arid regions of northwest China was getting wetter and that in the Yangzi River region was get. . .
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Effect of Large Eddy Horizontal Resolution on Simulation of Entrainment and Tracer Vertical Transport
WANG Rong, HUANG Qian, YUE Ping
Journal of Arid Meteorology, 2019 37 (1): 56
:The effects of horizontal resolution of the model on convection, entrainment process and vertical transmission of tracers in boundary layer were studied by using the field intensive observation data in Dunhuang arid area and large eddy model (LEM). The results show when the horizontal resolution of the model was improved, the more the number of convection bubbles, the smaller the scale and the stronger the convection intensity in the boundary layer were simulated. And the potential temperature variance increased, the horizontal velocity variance decreased, the vertical velocity variance increased, and the upward cold flow contributed the most to the heat flux in the entrainment layer. The h. . .
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Analysis on the Reasons for the Heavy Rainfall Associated with the Reinforcing Outer Spiral Rainband in Zhejiang Caused by Typhoon Meranti
DUAN Jingjing, QIAN Yanzhen, GUO Jianming
Journal of Arid Meteorology, 2019 37 (1): 66
The possible reasons for heavy rainfall during 13-16 September, 2016 caused by typhoon Meranti in Zhejiang Province were investigated by using numerical simulation output, NCEP reanalysis data, observed precipitation data from automatic stations and the Black Body Temperature data from infrared satellite observation. It was found that the heavy rain occurred on the right flank of the typhoon. The low-layer troposphere southeasterly flow promoted the reinforcing of the outer spiral rainbands in the northeastern quadrant of the typhoon after making landfall in Fujian, leading to an enhanced precipitation in Zhejiang. The control simulation indicated that the significant southeasterly to . . .
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Diurnal Variation Characteristics of Summer Precipitation in Zhejiang Province During 2004-2016
WANG Ying, LIU Danni, ZHANG Weiwei, MA Xinyu
Journal of Arid Meteorology, 2019 37 (1): 9
Based on hourly precipitation data from 71 meteorological stations in Zhejiang Province, the diurnal variation of summer precipitation from 2004 to 2016 were analyzed. The results are as follows: (1) The diurnal variations of summer precipitation amount and frequency were about double-peak structure with the main peak and the sub-peak, the main peak of precipitation amount and frequency appeared around 17:00 and 19:00, respectively. The precipitation and frequency showed an obvious increasing trend in the past 13 years. (2) The diurnal variation of precipitation was distinct in different regions of Zhejiang Province. There were small fluctuations of the diurnal variation of precipitation amo. . .
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Comparative Analysis of Drought in China and the United States in 2012
LIU Shuyan, RONG Yanshu, LYU Xingyue, YIN Yuting
Journal of Arid Meteorology, 2021 39 (5): 726
Based on the monthly precipitation grid data from GPCC, reanalysis data from NCEP/NCAR and sea surface temperature (SST) from NOAA, etc, the evolution characteristics of drought and its possible causes in China and the United States in 2012 were analyzed. The results are as follows: (1) In 2012, the drought was light in China, and it was discontinuous in time and disperse in space, while the drought in the United States reached a record high level, and the spatio-temporal distribution of drought was continuous, and the intensity of drought was significantly stronger than that in China. (2) In 2012, the average temperature was close to normal in China, while in the United States, a record hig. . .
