本文選題：積雪 + 凍融過程　； 參考：《干旱區(qū)研究》2017年04期

【摘要】：利用黃河源區(qū)鄂陵湖西側(cè)野外觀測(cè)站一個(gè)多雪年和一個(gè)少雪年的數(shù)據(jù),對(duì)多雪年和少雪年土壤凍融過程及水熱分布進(jìn)行了對(duì)比分析。結(jié)果表明:黃河源區(qū)多雪年積雪集中時(shí)段1—3月氣溫明顯偏低,分別比少雪年低3.04℃、3.15℃、3.58℃。多雪年1—3月地氣間熱交換明顯弱于少雪年,且多雪年土壤由熱源轉(zhuǎn)為熱匯的時(shí)間晚于少雪年。多雪年1月土壤凈輸出的熱量少于少雪年1月,多雪年2—3月土壤凈輸出的熱量多于少雪年2—3月,導(dǎo)致多雪年1月土壤溫度高于少雪年各土層,而2—3月土壤溫度明顯低于少雪年,且多雪年1—3月土壤升溫速度慢于少雪年,使得多雪年5~40 cm各土層土壤消融初日比少雪年分別晚24 d、23 d、11 d和12 d,從而導(dǎo)致多雪年土壤濕度增加晚于少雪年。
[Abstract]:Based on the data of one snow year and one less snow year at the field observation station on the west side of Eling Lake in the source region of the Yellow River, the freezing and thawing process and the distribution of water and heat of the soil in the years of more snow and less snow were compared and analyzed. The results show that the temperature in January and January is obviously lower than that in less snow year in the source region of Yellow River, which is 3.04 鈩，

本文編號(hào)：1899793