Liu Bin,Luo Qinghong,Feng Deen,et al.Responses of Vegetation Photosynthetic Phenology in Spring to Climate Factors in Northern China[J].Research of Soil and Water Conservation,2024,31(06):237-242.[doi:10.13869/j.cnki.rswc.2024.06.006]
中国北方地区植被春季光合物候对气候因素的响应
- Title:
- Responses of Vegetation Photosynthetic Phenology in Spring to Climate Factors in Northern China
- 文章编号:
- 1005-3409(2024)06-0237-06
- Keywords:
- vegetation photosynthetic phenology in spring; spatiotemporal change; climate factors; northern China
- 分类号:
- Q948
- 文献标志码:
- A
- 摘要:
- [目的]探究植被春季光合物候(SOS)的时空变化趋势,揭示气候因素对其影响贡献,为区域植被固碳能力提升提供科学依据。[方法]以中国北方地区为例,基于日光诱导叶绿素荧光反演的总初级生产力数据(GOSIF-GPP)、气象数据等分析了该地区2001—2020年SOS的变化特征,并揭示了其对不同气候因素(如最低气温、最高气温、降水和太阳辐射)的响应差异。[结果](1)中国北方地区SOS的平均值主要出现在第105～150天,较晚的SOS主要分布在青海和内蒙古中东部。(2)2001—2020年区域年平均SOS呈显著提前趋势(p<0.05),变化幅度为-0.31 d/a,且不同植被类型的SOS均呈显著提前趋势(p<0.05)。(3)SOS对4个气候因素呈负敏感性,特别是最高气温和最低气温是影响SOS变化的重要气候因素,反映了气温升高有利于中国北方大部分地区SOS提前。[结论]中国北方地区SOS变化具有异质性,且气温是影响SOS变化的主要因素。
- Abstract:
- [Objective]The aims of this study are to understand the spatiotemporal trends in vegetation photosynthetic phenology(SOS)in spring, to reveal the contribution of climate factors, and to provide a scientific basis for increasing carbon sequestration capacity of vegetation. [Methods]Northern China was taken as a case study. The changing characteristics of SOS from 2001 to 2020 in this region were analyzed based on the gross primary productivity data from solar-induced chlorophyll fluorescence(GOSIF-GPP)and meteorological data. Furthermore, the responses of different climate factors(e. g., minimum air temperature, maximum air temperature, precipitation, and solar radiation)on SOS were assessed. [Results]The mean value of SOS in northern China mainly occurred from the 105th day to the 150th day in a year, and the later SOS was mainly distributed in Qinghai and east-central Inner Mongolia. The regional mean SOS from 2001 to 2020 showed a significant advancing trend(p<0.05)with a magnitude of -0.31 d/a, and the SOS of all vegetation types showed a significant advancing trend(p<0.05). The SOS was negatively sensitive to four climate factors, especially the maximum and minimum air temperatures were important climate factors influencing the SOS changes, reflecting that warmer temperature was favorable to the advancing SOS in the most region of northern China. [Conclusion]The SOS changes in the northern China are heterogeneous, and air temperature is the main factor affecting SOS changes.
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备注/Memo
收稿日期:2024-01-09 修回日期:2024-02-15
资助项目:阿克苏河流域山水林田湖草沙系统治理项目(AKSSSXM2022620); 江苏省科协青年科技人才托举工程项目(TJ-2023-032); 扬州大学人文社会科学研究资助项目(xjj2023-05); 扬州大学“青蓝工程”资助项目(2023)
第一作者:刘彬(1990—),男,江苏扬州人,硕士,工程师,研究方向为3S集成与气象应用。E-mail:liubin752@163.com
通信作者:李成(1988—),男,江苏南京人,博士,副教授,主要从事地气交换与气候变化研究。E-mail:licheng_nj@163.com