畜牧与饲料科学
畜牧與飼料科學
축목여사료과학
ANIMAL HUSBANDRY AND FEED SCIENCE
2012年
9期
11-13
,共3页
冻土深度%变化趋势%突变%地温%气温
凍土深度%變化趨勢%突變%地溫%氣溫
동토심도%변화추세%돌변%지온%기온
depth of frozen earth%change trend%mutation%ground temperature%air temperature
利用描述分析、线性趋势拟合和累积距平方法对通辽国家基本气象观测站（以下简称通辽站）1962—2011年50年的年最大冻土深度、冬季（10月—翌年2月）各月平均最低气温和平均最低地面温度资料进行了对比分析。结果表明,通辽站最大冻土深度多年平均可达131.7cm,最大值出现在1977年2月,最小值出现在2007年2月,两者相差1.4倍;在全球气候变暖的大背景下,通辽站最大冻土深度的年代际变化特征明显,在20世纪60—70年代末期,最大冻土深度呈逐渐增大趋势,80年代以后该值逐年减小;在50年时间尺度上,通辽站最大冻土深度存在2次突变过程,突变时间点在1971/1972年冬季和2005/2006年冬季。该地区最大冻土深度的变化与冬季平均最低地温和平均最低气温的变化呈显著的负相关关系,气温和地温低则冻土层厚,否则冻土层薄,最大冻土深度出现的最大值月份比最低气温和地温出现月要滞后1～2个月。
利用描述分析、線性趨勢擬閤和纍積距平方法對通遼國傢基本氣象觀測站（以下簡稱通遼站）1962—2011年50年的年最大凍土深度、鼕季（10月—翌年2月）各月平均最低氣溫和平均最低地麵溫度資料進行瞭對比分析。結果錶明,通遼站最大凍土深度多年平均可達131.7cm,最大值齣現在1977年2月,最小值齣現在2007年2月,兩者相差1.4倍;在全毬氣候變暖的大揹景下,通遼站最大凍土深度的年代際變化特徵明顯,在20世紀60—70年代末期,最大凍土深度呈逐漸增大趨勢,80年代以後該值逐年減小;在50年時間呎度上,通遼站最大凍土深度存在2次突變過程,突變時間點在1971/1972年鼕季和2005/2006年鼕季。該地區最大凍土深度的變化與鼕季平均最低地溫和平均最低氣溫的變化呈顯著的負相關關繫,氣溫和地溫低則凍土層厚,否則凍土層薄,最大凍土深度齣現的最大值月份比最低氣溫和地溫齣現月要滯後1～2箇月。
이용묘술분석、선성추세의합화루적거평방법대통료국가기본기상관측참（이하간칭통료참）1962—2011년50년적년최대동토심도、동계（10월—익년2월）각월평균최저기온화평균최저지면온도자료진행료대비분석。결과표명,통료참최대동토심도다년평균가체131.7cm,최대치출현재1977년2월,최소치출현재2007년2월,량자상차1.4배;재전구기후변난적대배경하,통료참최대동토심도적년대제변화특정명현,재20세기60—70년대말기,최대동토심도정축점증대추세,80년대이후해치축년감소;재50년시간척도상,통료참최대동토심도존재2차돌변과정,돌변시간점재1971/1972년동계화2005/2006년동계。해지구최대동토심도적변화여동계평균최저지온화평균최저기온적변화정현저적부상관관계,기온화지온저칙동토층후,부칙동토층박,최대동토심도출현적최대치월빈비최저기온화지온출현월요체후1～2개월。
Using the descriptive analysis,linear trend fitting and cumulative anomaly methods,the annual maximum depth of frozen soil,the average minimum air temperature and the average minimum ground temperature in each winter month(from October to the next February) at Tongliao National Basic Meteorological Observation Station during 1962-2011 were compared and analyzed.The results showed that the maximum depth of frozen soil at Tongliao Station for many years on the average reached 131.7 cm.And the maximum value appeared in February of 1977 and the minimum value appeared in February of 2007,and the maximum value was 1.4 times as the minimum.Under the background of the global climate warming,the maximum depth of frozen soil at Tongliao Station had obvious age change characteristics.At the terminal stage of 1960s-1970s,the maximum depth of frozen soil showed a gradual increasing trend.And the maximum depth of frozen soil showed a gradual decreasing trend after 1980s.At time scale of 50 years,the maximum depth of frozen soil at Tongliao Station had twice mutations,which occurred in the winter of 1971-1972 and 2005-2006.The maximum depth changes of the frozen soil at Tongliao Station showed significant negative correlations with the changes of the average minimum air temperature and minimum ground temperature.The lower the air temperature and ground temperature were,the thicker the layer of frozen soil was,and vice versa.The appearing time of the maximum depth of frozen soil was 1-2 months later than that of the minimum air temperature and ground temperature.
