【摘要】 天山地区28个气象台站1961～1990年冬季降雪资料表明,天山北坡冬季降雪大于南坡。天山降雪从西部向东部逐渐减少,由山区向平原盆地逐渐减少,天山西部伊犁河谷冬季降雪最丰,吐鄯托盆地最贫。天山北坡广大地区在1961～1990年的30a中,冬季降雪略有增加。天山西部伊犁河谷及天山北坡由西向东冬季降雪存在10a,7.5a和6a的显著波动周期,天山南坡及吐鄯托盆地冬季降雪周期不明显。更多还原

【Abstract】 This paper was written on the basis of winter snowfall data from 28 meteorological stations during 1961-1990. The snowfall on the north flank of the Tianshan Mountains is more than that on the south flank. The snowfall decreases gradually in the direction from west to east. The Yili Valley has the richest snowfall and the Turpan-Shanshan-Tukeshun basin the poorest. The winter snowfall increases slightly during recent 30 years.The snowfall in the Yili Valley and on the north flank of the Tianshan Mountains has a variation period of 10, 7.5 or 6 years. The period on the south flank is not obvious.更多还原