近50 a新疆风蚀气候侵蚀力迁移特征及影响因素研究

doi:10.12118/j.issn.1000–6060.2021.228

Abstract

Abstract:

Based on daily meteorological data of 62 meteorological stations in Xinjiang, China from 1969 to 2019, this study investigated the influence of meteorological factors on wind erosion climatic erosivity. Geographically weighted regression and gravity center migration models were used to analyze the gravity center migration law of wind erosion climatic erosivity in Xinjiang from the spatial and temporal scales. Combined with the effective sensitivity index and effective affected area, the sensitivity degree of wind erosion climatic erosivity to various meteorological factors was quantitatively described. The dominant factors of wind erosion climatic erosivity in different regions of Xinjiang were analyzed. The results showed that the center of gravity of wind erosion for the past 50 years is mainly located at the junction of the north-south and east boundaries. The migration directions of inter-annual and inter-month show a northwest-southeast-northwest cycle. The center of gravity of wind erosion moves from the northwest to the southeast at the onset of the spring and summer and then moves back to the northwest when the cold season approaches. The degree of influence of climatic factors on wind erosion climatic erosivity is shown as wind speed>air temperature>precipitation>relative humidity. In the past 30 years, the effective influence of wind speed, mean air temperature, humidity, and precipitation on wind erosion has decreased by 124598.15 km², 51891.28 km², 11287.12 km², and 18627.12 km², respectively. Regionally, the wind erosion climatic erosivity is mainly influenced by relative humidity and precipitation in the Altai Prefecture of north Xinjiang. Wind speed and temperature are the main factors influencing wind erosion climatic erosivity in the southwest of southern Xinjiang. Wind erosion climatic erosivity in eastern Xinjiang is affected only by wind speed. The research results can provide regionally differentiated theoretical guidance for preventing and assessing soil wind erosion disasters in Xinjiang. It can also provide new research perspectives for studying large-scale driving forces of soil wind erosion.

Key words: wind erosion climate erosivity, climate change, center of gravity migration, geographically weighted regression, Xinjiang

WANG Yaqin,YANG Haimei,FAN Wenbo,XU Zhongyu,QIAO Changlu. Migration characteristics of wind erosion climate erosivity and its influencing factors in Xinjiang in recent 50 years[J].Arid Land Geography, 2022, 45(2): 370-378.

Figures/Tables 5

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References 30

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年份	风蚀气候侵蚀力重心坐标		移动距离/km	移动方向
年份	经度	纬度	移动距离/km	移动方向
1969	88°31′14″E	42°27′28″N	-	-
1975	87°08′59″E	43°28′17″N	190.89	144°(NW)
1980	88°23′02″E	42°44′51″N	129.93	321°(SE)
1985	87°25′51″E	43°18′38″N	93.40	132°(NW)
1990	87°39′25″E	43°15′30″N	27.58	323°(SE)
1995	87°16′30″E	43°42′50″N	62.61	112°(NW)
2000	88°59′31″E	43°00′05″N	200.68	336°(SE)
2005	90°02′23″E	42°52′49″N	117.45	352°(SE)
2010	90°05′24″E	42°49′21″N	7.20	321°(SE)
2015	88°48′29″E	42°59′16″N	143.59	173°(NW)
2019	88°56′35″E	43°04′06″N	15.90	56°(NE)

月份	风蚀气候侵蚀力重心坐标		移动距离/km	移动方向
月份	经度	纬度	移动距离/km	移动方向
1	89°31′02″E	42°39′10″N	35.72	295°(SE)
2	89°39′04″E	42°22′38″N	156.87	161°(NW)
3	88°19′08″E	42°50′51″N	99.75	137°(NW)
4	87°40′11″E	43°27′53″N	17.17	7°(NE)
5	87°49′22″E	43°28′09″N	6.28	274°(SE)
6	87°50′36″E	43°25′46″N	10.34	0(E)
7	87°55′11″E	43°25′06″N	10.84	94°(NW)
8	87°54′59″E	43°31′33″N	14.07	158°(NW)
9	87°47′58″E	43°33′27″N	10.23	74°(NE)
10	87°49′26″E	43°38′47″N	84.71	295°(SE)
11	88°08′15″E	42°57′05″N	74.93	330°(SE)
12	88°43′04″E	42°36′28″N	88.98	3°(NE)

Migration characteristics of wind erosion climate erosivity and its influencing factors in Xinjiang in recent 50 years

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