In order to evaluate how the water body affects the air temperature observing quantitatively, two observing experiments and some numerical simulations were conducted. The results are:(1) The observing experiments indicate that:the air temperature around the water body is increased at night and decreased at daytime. The nearer to the water body, the stronger of the inference is. For the small-scale water body, the scope of the effects is obvious at 200 m at the lee shore in winter, and it seems decrease in spring. While for the large-scale water body, the scope of the effects is obvious about 1km. There are upper bounds of wind speed for the effects at night, 3 m·s-1 to the small water body, 4 m·s-1 to the large one. When wind flow under the bound value, the warming effects are obvious, however, the effects are no show if the wind beyond the bound value. No upper bound appeared during the daytime. (2)Simulations show the same pattern of the effects that the surrounding air of water body is warming at night and cooling at daytime. But the effecting scopes are smaller than the observations. 0.5℃ warm curve is 100 m to the small water body, and 0.2℃ warm curve is 3.7 km to the large water body. (3) The effects of the water body on the surrounding air temperature are sensitive to the background wind speed, initial temperature and weather condition. The intensity and the distance of the effects are larger with the increase of the wind speed limited to the upper bound at night, the temperature at daytime and the decrease of the temperature at night. Different weather conditions, there are different effect of water body on temperature.
YOU Yuan
,
GUO Jianxia
,
CHEN Yi-zhi
,
SHEN Xuefeng
,
JIN Lianji
,
ZHONG Zhuhui
. Observation Experiment and Simulation Evaluation of Influence of Non-Frozen Water Body on Air Temperature[J]. Plateau Meteorology, 2016
, 35(2)
: 495
-506
.
DOI: 10.7522/j.issn.1000-0534.2015.00005
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