Journal of Resources and Ecology, Volume. 11, Issue 3, 304(2020)
Variations in the Drought Severity Index in Response to Climate Change on the Tibetan Plateau
Figures & Tables(12)
Fig. 1. Linear trends for (a) Ta, average annual air temperature; (b) MAT, maximum air temperature; (c) MIT, minimum air temperature; (d) EMAT, extreme maximum air temperature; (e) EMIT, extreme minimum air temperature; (f) TP, total precipitation; (g) MAP, maximum precipitation; (h) Ea, average vapor pressure; (i) RH, average relative humidity; (j) MIRH, minimum relative humidity; (k) VPD, average vapor pressure deficit; (l) SP, percentage of sunshine; (m) SH, sunshine hours; and (n) WS, average wind speed; from 2000 to 2011 based on data from 69 meteorological stations on the Tibetan Plateau.
Fig. 2. Linear trends for the annual drought severity index (DSI) from 2000 to 2011, for different vegetation types on the Tibetan Plateau
Fig. 3. Drought severity index trend from 2000 to 2011 on the Tibetan Plateau
Fig. 4. Relationships of the linear trend of the annual drought severity index (Slope_DSI) with climate variables on the Tibetan Plateau. (a) average annual temperature (Ta); (b) maximum annual temperature (MAT); (c) minimum annual temperature (MIT); (d) extreme maximum annual temperature (EMAT); (e) extreme minimum annual temperature (EMIT); (f) annual precipitation (TP); (g) maximum annual precipitation (MAP); (h) average annual vapor pressure (Ea); (i) annual sunshine percentage (SP); (j) annual sunshine hours (SH); and (k) average annual wind speed (WS).
Fig. 5. Relationships between the linear trend of the annual drought severity index (Slope_DSI) and the linear trends of several climate factors: (a) maximum annual temperature (Slope_MAT); (b) extreme maximum annual temperature (Slope_EMAT); (c) extreme minimum annual temperature (Slope_EMIT); (d) annual precipitation (Slope_TP); (e) annual sunshine percentage (Slope_SP); and (f) annual sunshine hours (Slope_SH).
Fig. 6. Annual trends for (a) Ta, average air temperature; (b) MAT, maximum air temperature; (c) MIT, minimum air temperature; (d) EMAT, extreme maximum air temperature; (e) EMIT, extreme minimum air temperature; (f) WS, average wind speed; from 2000 to 2011 at 69 meteorological stations on the Tibetan Plateau.
Fig. 7. Annual trends for (a) TP, total precipitation; (b) MAP, maximum precipitation; (c) Ea, average vapor pressure; (d) RH, average relative humidity; (e) MIRH, minimum relative humidity; (f) VPD, average vapor pressure deficit; from 2000 to 2011 at 69 meteorological stations on the Tibetan Plateau.
Fig. 8. Annual trends for (a) SP, percentage of sunshine; (b) SH, sunshine hours; from 2000 to 2011 at 69 meteorological stations on the Tibetan Plateau.
Fig. 9. Correlation coefficients of the drought severity index (DSI) with: (a) Ta, average air temperature; (b) MAT, maximum air temperature; (c) MIT, minimum air temperature; (d) EMAT, extreme maximum air temperature; (e) EMIT, extreme minimum air temperature; (f) WS, average wind speed; from 2000 to 2011 at 69 meteorological stations on the Tibetan Plateau.
Fig. 10. Correlation coefficients of the drought severity index (DSI) with: (a) TP, total precipitation; (b) MAP, maximum precipitation; (c) Ea, average vapor pressure; (d) RH, average relative humidity; (e) MIRH, minimum relative humidity; (f) VPD, average vapor pressure deficit; from 2000 to 2011 at 69 meteorological stations on the Tibetan Plateau.
Fig. 11. Correlation coefficients of the drought severity index (DSI) with annual: (a) SP, percentage of sunshine; (b) SH, sunshine hours; from 2000 to 2011 at 69 meteorological stations on the Tibetan Plateau.
Table 1.
Correlation coefficients for spatially averaged annual drought severity index (DSI) with spatially averaged climate factors from 2000 to 2011 at 69 meteorological stations on the Tibetan Plateau
View tableView in ArticleTable 1.
Correlation coefficients for spatially averaged annual drought severity index (DSI) with spatially averaged climate factors from 2000 to 2011 at 69 meteorological stations on the Tibetan Plateau
Types Ta MAT MIT EMAT EMIT TP MAP Ea RH MIRH VPD SP SH WS Alpine meadows -0.11 -0.42 0.26 -0.43 -0.08 0.59* 0.20 0.67* 0.50 0.71** -0.35 -0.85*** -0.87*** 0.49 Alpine steppes 0.28 -0.07 0.58* -0.36 0.20 0.70* 0.19 0.07 -0.17 -0.35 0.23 -0.74** -0.74** 0.19 Temperate steppes 0.20 0.10 0.25 0.04 0.57 0.42 -0.19 0.29 -0.16 0.07 0.34 -0.23 -0.19 0.18 Croplands -0.34 -0.48 -0.14 -0.55 -0.05 0.43 -0.22 0.36 0.50 0.26 -0.49 -0.90*** -0.91*** 0.26 Forests -0.71** -0.77** -0.73** -0.63* -0.69* 0.54 0.24 0.74** 0.78** -0.04 -0.76** -0.66* -0.65* -0.02 Shrublands -0.66* -0.78** -0.51 -0.61* -0.36 0.66* -0.43 0.69* 0.75** 0.83*** -0.73** -0.75** -0.75** 0.03 All types -0.28 -0.49 -0.03 -0.40 -0.11 0.61* -0.18 0.54 0.50 0.74** -0.42 -0.86*** -0.86*** 0.31
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Xiangtao WANG, Xianzhou ZHANG, Junhao WANG, Ben NIU. Variations in the Drought Severity Index in Response to Climate Change on the Tibetan Plateau[J]. Journal of Resources and Ecology, 2020, 11(3): 304
Paper Information
Received: Jan. 9, 2020
Accepted: Mar. 17, 2020
Published Online: Apr. 23, 2021
The Author Email: NIU Ben (niub@igsnrr.ac.cn)
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