The landform landforms with Tibetan complex and diversiform highland, formed distinctive downy climate.
Except present northwest severe cold dry, outside the general trend with southeast wet warmth, still have varied area climate and apparent perpendicular climate area. "10 lis of different days " , " have the four seasons one day " wait for adage, mirrorred these characteristics namely. Photograph of as major as China area is compared, tibetan sky is rare, sunshine is enough, air temperature is inferior, precipitation is less. Here contains Tibetan highland only in every stere air oxygen makes an appointment with 170 grams of 150 ─ , be equivalent to Campagna area 62% to 65.4% . Tibet is the place with Chinese sun most radiant energy, times more than be the same as the Campagna area of latitude or the high cost center that 1/3 sunshine duration also is the whole nation, duration amounts to year of average sunshine of Lhasa city 3021 hours. Air temperature on the low side, year difference in temperature is small, but difference in temperature of day and night is big. Noise made in coughing or vomiting of Lhasa, day criterion the Chongqing with year of average air temperature and more latitudinal than close air temperature of the hottest month, Wuhan, Shanghai is low 10 ─ 15 Celsius. Lhasa, prosperous, day year of difference in temperature of and other places of criterion of noise made in coughing or vomiting for 18 ─ the ground of 5000 meters of above enraged altitude of the area in 20 Celsius A by day in August Wen Wei 10 Celsius above, and nightly air temperature falls to centigrade zero the following. The season of precipitation of each district of the Xizang Autonomous Region allocates not all, the dividing line blame of dry Ji Heyu is apparent, and nocturnal rain. Year fall from the 5000 millimeter with low-lying southeast, decrease successively northwest gradually 50 millimeter. Came every year in October immediately following in time year in April, fall occupies annual only 10 ％ come 20 ％ ; Come from May September, rainfall special concentration, occupy the 90 ％ left and right sides of annual fall commonly.
In recent years, as Tibetan population increase, the whole world is calefacient, tibetan climate also is in producing tremendous change. Far do not say, speak of from 2001, 2001 May, air temperature is highest control in 20 degrees, now annual in May, highest value had achieved the climate of Lhasa 28, 29 degrees. In the meantime, the rise of temperature also is showing an issue, aerobic content also is rising, it lives fitter and fitter people.
Began every year in May, tibet entered travel peak period, and arrived 89 month, no matter be,be being returned from climate is from the road besides go up for, tibet entered the optimal gold time of travel. To live of Tibet you, should not miss this auspicious time! !
