To better understand the wind system in the Tibetan mountains and its impacts on the civil aviation safety, the vertical structure and variation of the low-level winds over the Nyingchi Airport, in the Yarlung Zangbo valley of the Southeast Tibet, are analyzed and discussed, based on the observed wind data. It is revealed that the winds on the surface and in the Yarlung Zangbo valley have consistent diurnal and seasonal variations, with a dominating southeasterly across the airport runway. A strong lateral wind, with an averaged maximum speed over 6.0 m·s-1, in the afternoon could greatly lower the approaching, taking-off and landing flight safety. Above the Yarlung Zangbo valley, the wind field can be divided into two layers, with different diurnal and seasonal variations. The winds in the upper layer reflect the large-scale circulation over this region. The winds in the Yarlung Zangbo valley have almost no kinetic relation to the upper layer winds over the valley. Therefore, to alert and predict the strong wind threatening the flight safety, understanding the wind system in the valley is essentially necessary.
XU Hai
,
ZOU Han
,
LI Peng
,
TAN Bo
. Vertical Structure and Variation of Wind Field over Nyingchi Airport Southeast Tibet[J]. Plateau Meteorology, 2014
, 33(2)
: 355
-360
.
DOI: 10.7522/j.issn.1000-0534.2013.00009
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