發(fā)布時間：2018-03-02 05:27

  本文關(guān)鍵詞： 羌塘高原 土壤溫度 凍結(jié)消融過程 水熱交換 青藏高原　出處：《地理研究》2017年11期 　論文類型：期刊論文

【摘要】：基于羌塘高原核心區(qū)布設(shè)的19套土壤溫濕度儀器和3個自動氣象站2013年9月-2014年10月間的監(jiān)測數(shù)據(jù),分析羌塘高原核心區(qū)不同站點在1 cm、10 cm、20 cm深度處的土壤溫度日變化和季節(jié)變化特征。結(jié)果表明:(1)研究時段內(nèi)站點1 cm、10 cm、20 cm深度土壤的日均溫在-16.27~17.18℃之間波動,隨著土壤深度的增加,溫度變幅逐漸減小。(2)站點間的日均溫差最大不超過12.82℃,主要受海拔與緯度的影響。晝夜變化呈現(xiàn)升溫快,降溫慢的特征。(3)不同深度的土壤平均最冷月均溫為-12.69℃,最暖月均溫為13.15℃,土壤日平均溫度的年際變幅在30℃左右。在土壤凍結(jié)/消融過程中土壤溫度的變異系數(shù)很高,表層更加明顯,且消融過程變異性比凍結(jié)過程更強。(4)在月尺度上土壤1 cm日平均溫度與氣溫的相關(guān)性最強,可達(dá)到0.99以上。研究將有助于填補該地區(qū)土壤溫度數(shù)據(jù)的空白,對認(rèn)識該區(qū)域冰凍、消融交替過程中土壤熱量遷移的連續(xù)變化也有重要的意義。
[Abstract]:Layout of the Qiangtang plateau in the core area of the 19 sets of soil temperature and humidity and 3 automatic weather stations in September 2013 -2014 year in October between the monitoring data based on the analysis of different sites in Qiangtang plateau in core area of 1 cm, 10 cm, the change of soil temperature diurnal and seasonal characteristics at 20 cm depth. The results showed that: (1) during the period of study site 1 cm, 10 cm, the average temperature of 20 cm depth of soil in the range of -16.27~17.18 DEG C, with the increase of soil depth, the temperature amplitude decreased gradually. (2) the average daily maximum temperature difference between the site does not exceed 12.82 degrees, mainly affected by the altitude and latitude. The influence of diurnal variation showed fast heating, slow cooling characteristics. (3) different depth average soil average temperature of the coldest month is -12.69 centigrade, the warmest month average temperature is 13.15 degrees, the interannual variation of daily average soil temperature at 30 degrees Celsius. In the soil freezing / coefficient of variation of soil temperature in the ablation process is very high, the surface is more clear Obviously, and the ablation process variability than the freezing process stronger. (4) in the month scale correlation 1 cm daily average soil temperature and air temperature, can reach more than 0.99. The research will help to fill the gaps in the soil temperature data of the region, to understand the regional frozen, alternating continuous ablation changes of soil heat transfer the process also has an important significance.

【作者單位】： 中國科學(xué)院地理科學(xué)與資源研究所陸地表層格局與模擬重點實驗室;中國科學(xué)院大學(xué);中國科學(xué)院青藏高原地球科學(xué)卓越創(chuàng)新中心;江西師范大學(xué)地理與環(huán)境學(xué)院鄱陽湖濕地與流域研究教育部重點實驗室;
【基金】：國家科技基礎(chǔ)性工作專項重點項目(2012FY111400) 中國科學(xué)院戰(zhàn)略性先導(dǎo)科技專項(XDB03030500) 國家科技支撐計劃(2012BAC06B00)
【分類號】：S152.8

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本文編號：1555220