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[1]WANG Zhigang,CAO Shengkui,CAO Guangchao.Analysis on the Drive of Temperature and Precipitation Changes to Vegetation Phenology of the Qinghai Lake Basin in the Past 15 Years[J].Research of Soil and Water Conservation,2022,29(01):249-255.

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Analysis on the Drive of Temperature and Precipitation Changes to Vegetation Phenology of the Qinghai Lake Basin in the Past 15 Years

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 29 Number of periods: 2022 01 Page number: 249-255 Column: Public date: 2022-02-20

Title:: Analysis on the Drive of Temperature and Precipitation Changes to Vegetation Phenology of the Qinghai Lake Basin in the Past 15 Years

Author(s):: WANG Zhigang^1,2,3, CAO Shengkui^1,2,3, CAO Guangchao^2,3; (1.College of Geographical Sciences, Qinghai Normal University, Xining 810008, China; 2.Qinghai Provincial Key Laboratory of Physical and Environmental Processes, Qinghai Normal University, Xining 810008, China; 3.Academy of Plateau Science and Sustainability, People's Government of Qinghai Province & Beijing Normal University, Xining 810008, China)

Keywords:: Qinghai Lake Basin; temperature and precipitation changes; vegetation phenology; drive analysis

CLC:: K903; Q142.2

DOI:: -

Abstract:: Analysis of drive of climate change on vegetation phenology is of great significance for in-depth understanding of the adaptation of alpine vegetation to global climate change. We used MCD12Q2 vegetation phenology data, correlation analysis method and GIS spatial analysis method to study the relationship between temperature and precipitation changes and vegetation phenology in the Qinghai Lake Basin in the past 15 years. The results showed that in the past 15 years, the annual average temperature in the Qinghai Lake Basin had a significant correlation with the start of growing season(SOS), the length of growing season(LOS), and the dormancy of growing season(DOS); the partial correlation coefficients were 0.36～0.57, -0.89～0.81 and -0.29～0.51, respectively; the partial correlation coefficients with the average annual precipitation were -0.58～0.38, -0.82～0.93 and -0.23～0.23, respectively; SOS and LOS of the vegetation in the Qinghai Lake Basin were mainly affected by the combined effect of the annual average temperature and precipitation, while the DOS was affected by the annual average temperature; in the past 15 years, SOS,LOS and DOS of the vegetation in the Qinghai Lake Basin were mainly driven by temperature andprecipitation, the proportions of the regions driven by temperature, precipitation and their combination were 33.7%,22.5% and 36.67%, respectively, the proportions of the regions driven by non-temperature-precipitation were 66.3%,77.5% and 63.33%, respectively; along the altitude gradient, the vegetation phenology was mainly affected by temperature and precipitation, the annual average temperature rose by 1℃, the vegetation SOS was advanced by 0.35 day, and the vegetation LOS was extended by 0.15 day; the average annual precipitation increased by 1 mm, the vegetation SOS was delayed by 4 days, the vegetation LOS was shortened by 1.69 days, and the vegetation DOS was advanced by 2.85 days. The drives of changes in temperature and precipitation to vegetation phenology in the Qinghai Lake Basin in the past 15 years had the spatial differences. The vegetation phenology in space was mainly affected by non-temperature precipitation, and the vegetation phenology along the altitude gradient was significantly affected by temperature and precipitation.

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Last Update: 2022-02-20