1981-2017年西藏“一江两河”流域5 cm地温及其界限温度时空变化特征
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杜军,胡军,尼玛吉,次旺顿珠
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Spatial-temporal change of mean soil temperature and its critical temperature at 5 cm depth in the region of the Yarlung Zangbo River and its two tributaries of Tibet during 1981-2017
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DU Jun,HU Jun,Nimaji ,Ciwangdunzhu
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表4 西藏“一江两河”5 cm地温≥ 12 ℃与≥ 14 ℃初日、终日、持续日数和积温变化趋势
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Tab. 4 Linear trend of the beginning day, terminal day, duration and accumulated temperature of the daily soil temperature at 5 cm depth above 12 ℃ and 14 ℃ stably in the region of the Yarlung Zangbo River and its two tributaries of Tibet during 1981-2017
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| 站点 | ≥ 12 ℃ | ≥ 14 ℃ | 初日
(d/10a) | 终日
(d/10a) | 初终间
(d/10a) | 积温
(℃·d/10a) | 初日
(d/10a) | 终日
(d/10a) | 初终间
(d/10a) | 积温
(℃·d/10a) | | 拉孜 | -8.8**** | 2.5* | 11.3**** | 230.5**** | -9.7**** | 5.9** | 15.6**** | 280.7**** | | 南木林 | -3.9*** | 2.5* | 5.3*** | 103.1*** | -1.9 | 8.2*** | 10.1*** | 182.1**** | | 日喀则 | -3.3* | -0.1 | 3.2* | 113.7**** | -4.8*** | 2.5** | 7.3**** | 171.1**** | | 尼木 | -3.4** | 1.2 | 4.5** | 151.3*** | -6.1**** | 2.2 | 8.2*** | 201.2**** | | 贡嘎 | -8.8**** | 0.8 | 9.5**** | 271.8**** | -9.3**** | 0.8 | 10.1**** | 275.5**** | | 拉萨 | -5.6*** | 2.9*** | 8.5**** | 195.8**** | -5.8** | 3.3* | 9.1*** | 201.4*** | | 墨竹工卡 | -8.1**** | 7.0**** | 15.1**** | 316.0**** | -8.2*** | 10.0**** | 18.2**** | 363.5**** | | 泽当 | -7.2**** | 1.9** | 9.1**** | 259.0**** | -7.2*** | 3.9* | 11.1**** | 288.5**** | | 江孜 | -4.4*** | 1.8* | 6.2*** | 164.9**** | -4.0** | 11.5**** | 15.5**** | 301.3**** | | 流域平均 | -5.7**** | 2.0** | 7.5**** | 194.2**** | -6.3**** | 5.4**** | 11.7**** | 257.4**** |
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