GAO Zhenxiang,YE Jian,DING Renhui,et al.Response of Vegetation Gross Primary Productivity to Climate Change in China[J].Research of Soil and Water Conservation,2022,29(04):394-399+414.
中国植被总初级生产力对气候变化的响应
- Title:
- Response of Vegetation Gross Primary Productivity to Climate Change in China
- 文章编号:
- 1005-3409(2022)04-0394-06
- Keywords:
- gross primary productivity; climate change; driving factors; China
- 分类号:
- Q948
- 文献标志码:
- A
- 摘要:
- 为理解中国植被GPP的变化规律,基于改进后的EC-LUE模型,分析了中国1982—2016年植被GPP的空间格局、变化特征及驱动因子。结果表明:(1)中国植被GPP年变化范围介于0～3 051.08 g C/(m2·a),总体呈现出南高北低的空间分布特征。高值区主要分布在华南、东南沿海地区,低值区分布在青藏高原、新疆、内蒙古西部等地区;(2)近35 a中国植被GPP整体呈增加趋势,增加速率为2.43 g C/(m2·a)(p<0.05),特别是黄土高原地区植被GPP增加趋势明显,但在东北及东南沿海的部分地区呈显著减少的趋势;(3)中国植被GPP变化与气温和降水呈正相关关系,气温和降水强驱动的面积占比8.1%,气温为主要驱动因子的面积占比25.3%,降水为主要驱动因子的面积占比15.1%,气温和降水弱驱动面积占比8.9%。虽然近年来中国植被固碳能力呈变好趋势,但在未来气候变化存在不确定性的背景下,生态保护工作任重道远。
- Abstract:
- In order to understand the variation characteristics of vegetation gross primary productivity(GPP)in China, based on improved EC-LUE model, the spatiotemporal-variations and driving factors of GPP over China from 1982 to 2016 were analyzed. The results show that:(1)the average annual GPP in China during the 35 years ranged from 0 to 3 051.08 g C/(m2·a), which was higher in the northern China than that in the southern region; the high-value area mainly distributed in the southern and southeast of China, while the low-value area was located in the Qinghai-Tibet Plateau, Xinjiang, and western Inner Mongolia;(2)on the whole, overall GPP showed an increasing trend with an average annual growth rate of 2.43 g C/(m2·a); in particular, vegetation GPP in the Loess Plateau had a significant increasing trend, but it showed a significant decrease in parts of the northeast and southeast regions;(3)the vegetation GPP of China had positive correlations with temperature and precipitation, the air temperature and accumulated precipitation were strong drivers accounting for 8.1%, the air temperature drivers accounted for 25.3%, the accumulated precipitation driver accounted for 15.1%, and the air temperature and accumulated precipitation were weak drivers accounted for 8.9%. Although the vegetation carbon sequestration capacity in China had the improving trend, but the ecological protection work will have a long way to go under the background of uncertainty climate change in future.
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备注/Memo
收稿日期:2021-06-10 修回日期:2021-07-15
资助项目:国家自然科学基金(41801013); 江苏省自然科学基金(BK20180939); 国家重点研发计划(2018YFC1506100,2018YFC1506102); 江苏省气象局科研资助项目(KZ201905,KQ202118,KQ202013)
第一作者:高振翔(1988—),男,江苏宿迁人,硕士,工程师,主要从事气象与生态环境遥感研究。E-mail:ymbukn88@126.com
通信作者:李成(1988—),男,江苏南京人,博士,讲师,主要从事地气交换与气候变化研究。E-mail:licheng_nj@163.com