Page 154 - 《高原气象》2022年第1期

高 原 气 象 41 卷
152

Numerical Simulation of Typical Characteristics of Land Surface Water-heat
Zxchange over Gyaring Lake and Ngoring Lake in Summer

1，2
7
2
3
YANG Xianyu ，LÜ Yaqiong ，WEN Jun ，MA Yaoming 4，5，6 ，MENG Xianhong ，HUANG Anning ，
1，2
1
2
TIAN Hui ，ZHANG Shaobo ，WANG Yurun ，ZHAO Lin 2
1
（1. College of Atmospheric Sciences/ Plateau Atmosphere and Environment Key Laboratory of Sichuan Province，Chengdu
University of Information Technology，Chengdu 610225，Sichuan，China；
2. Northwest Institute of Eco-Environment andＲesources Chinese Academy of Sciences，Lanzhou 730000，Gansu，China；
3. Institute of Mountain Hazards and Environment，Chinese Academy of Sciences，Chengdu 610041，Sichuan，China；
4. Key Laboratory of Tibetan Environment Change and Land Surface Process．Institute of Tibetan Plateau Research
Chinese Academy of Sciences，Beijing 100101，China；
5. University of Chinese Academy of Sciences，Beijing 100049，China；
6. CAS Center for Excellence in Tibetan Plateau Earth Sciences，Beijing 100101，China；
7. School of Atmospheric Sciences，Nanjing University，Nanjing 210023，Jiangsu，China）

Abstract：To explore the Characteristics of Land Surface Water-heat Zxchange over Gyaring Lake and Ngoring
Lake in Summer，the new generation of mesoscale numerical model WRF（Weather Research and Forecasting
Model），developed by National Centers for Environmental Prediction（NCEP）and National Center for Atmo‐
spheric Research（NCAR）was used to simulate the characteristics of atmospheric boundary layer in Gyaring and
Ngoring Lakes area. The results show that the WRF model can preferably simulate the diurnal variation character‐
istics of 2 m height temperature，sensible heat and latent heat flux. Gyaring and Ngoring Lakes have great cool‐
ing（heating）effect to the air above lakes during the day（night），showing obvious cold（warm）lake effect，
and producing temperature difference between lakes and land. Such a temperature difference will affect the local
wind field. during the day，in the central area of Gyaring and Ngoring Lakes have the strength of 1. 0 m·s and
-1
-1
0. 5 m·s of downdrafts respectively，and an updraft of 2. 5 m·s in intensity appeared over the surrounding ar‐
-1
ea. The effect of Gyaring and Ngoring Lakes on sensible heat and latent heat during the day and night varies
greatly. The existence of the two lakes will make the sensible heat and latent heat value of the lake surface lower
than the surrounding land during the day，while the effect of the two lakes on sensible heat and latent heat at
night is opposite to that of the daytime. For the height of atmospheric boundary layer，the existence of Gyaring
and Ngoring Lakes effectively reduces the height of atmospheric boundary layer over the lake area during the
day，but the influence of Gyaring and Ngoring Lakes on the height of atmospheric boundary layer is not obvious
at night.
Key words：Gyaring Lake and Ngoring Lake；land-lake breeze；lake effect；numerical simulation