發(fā)布時(shí)間：2018-02-05 03:59

  本文關(guān)鍵詞： 最大凍土深度 變化趨勢(shì) 突變 松花江流域　出處：《資源科學(xué)》2017年01期 　論文類型：期刊論文

【摘要】：利用松花江流域內(nèi)及周邊的56個(gè)氣象站點(diǎn)資料,采用氣候統(tǒng)計(jì)學(xué)分析方法,對(duì)1960-2004年松花江流域最大凍土深度的時(shí)空變化及其與氣溫的關(guān)系進(jìn)行了分析。結(jié)果表明:流域年最大凍土深度分布整體呈由南向北增加的趨勢(shì)。月最大凍土深度有明顯的季節(jié)變化,最大值多出現(xiàn)在3月,且高緯度地區(qū)最大凍土深度均大于低緯度地區(qū)。1960-2004年松花江流域年最大凍土深度呈明顯下降趨勢(shì),變化率為-8.25 cm/10a,與凍土同期的年均氣溫呈顯著升高趨勢(shì),變化率為0.41℃/10a。年最大凍土深度在1980s中期發(fā)生突變,突變年前后最大凍土深度減小了35 cm。此外,年最大凍土深度和年均氣溫在時(shí)間和空間尺度上均呈顯著負(fù)相關(guān),高緯度地區(qū)最大凍土深度比低緯度地區(qū)對(duì)氣候變暖的響應(yīng)滯后。
[Abstract]:Using the data of 56 meteorological stations in and around the Songhua River Basin, the method of climate statistics analysis was used. The temporal and spatial variation of maximum frozen soil depth in Songhua River Basin from 1960 to 2004 and its relationship with air temperature are analyzed. The results show that:. The distribution of annual maximum frozen soil depth in the basin is increasing from south to north, and the monthly maximum permafrost depth has obvious seasonal variation. Most of the maximum occurred in March, and the maximum depth of frozen soil in the high latitude area was higher than that in the low latitude area. The annual maximum frozen soil depth of Songhua River basin in 1960-2004 showed an obvious downward trend. The change rate is -8.25 cm / 10 a, and the average annual air temperature in the same period is significantly higher than that of the frozen soil, and the change rate is 0.41 鈩，

本文編號(hào)：1492057