陆面模式中氮循环过程的引入Ⅰ:模式介绍及站点验证

	陆面模式中氮循环过程的引入Ⅰ:模式介绍及站点验证
其他题名	The integration of nitrogen dynamics into a land surface model. Part 1: model description and site-scale validation
	2019
发表期刊	大气和海洋科学快报
ISSN	1674-2834
卷号	12 期号:1 页码:50-57
摘要	Nitrogen cycling has profound effects on carbon uptake in the terrestrial ecosystem and the response of the biosphere to climate changes. However, nutrient cycling is not taken into account in most land surface models for climate change. In this study, a nitrogen model, based on nitrogen transformation processes and nitrogen fluxes exchange between the atmosphere and terrestrial ecosystem, was incorporated into the Atmosphere-Vegetation Interaction Model (AVIM) to simulate the carbon cycle under nitrogen limitation. This new model, AVIM-CN, was evaluated against site-scale eddy covariance-based measurements of an alpine meadow located at Damxung station from the FLUXNET 2015 dataset. Results showed that the annual mean gross primary production simulated by AVIM-CN (0.7073 gC m~(-2) d~(-1)) was in better agreement with the corresponding flux data (0.5407 gC m~(-2) d~(-1)) than the original AVIM (1.1403 gC m~(-2) d~(-1)) at Damxung station. Similarly, ecosystem respiration was also down-regulated, from 1.7695 gC m~(-2) d~(-1) to 1.0572 gC m~(-2) d~(-1), after the nitrogen processes were introduced, and the latter was closer to the observed vales (0.8034 gC m~(-2) d~(-1)). Overall, the new results were more consistent with the daily time series of carbon and energy fluxes of observations compared to the former version without nitrogen dynamics. A model that does not incorporate the limitation effects of nitrogen nutrient availability will probably overestimate carbon fluxes by about 40%.
其他摘要	陆地生态系统氮循环对碳循环过程及其对气候变化的反馈具有重要的影响,但当前陆面模式多数都没有考虑氮循环过程对碳循环过程的限制。本研究基于氮在土壤-植被-大气中的传输交换过程,将氮循环过程引入到陆面模式AVIM(Atmosphere-Vegetation Interaction Model)中,发展形成包含碳氮耦合过程的新版模式AVIM-CN。与2004-05年当雄生态系统定位站通量观测数据相对比,模式中引入氮循环过程后,高寒草甸的总初级生产力模拟值从1.1403 gC m~(-2) d~(-1)降到了0.7073 gC m~(-2) d~(-1),前者更接近通量站的观测值0.5407 gC m~(-2) d~(-1)。生态系统呼吸的模拟值也从1.7695 gC m~(-2) d~(-1)降到了1.0572 gC m~(-2) d~(-1),更接近对应的通量观测值0.8034 gC m~(-2) d~(-1)。整体而言,在模式中考虑氮的限制作用后,当雄站的热量通量和碳通量的模拟值更接近实测值。不考虑氮过程对碳过程的限制,模式高估了约40%的陆地生态系统碳通量。
关键词	Coupled carbon and nitrogen dynamics nitrogen limitation land surface model carbon-nitrogen-water cycles 碳氮耦合氮限制陆面模式碳-氮-水循环
收录类别	CSCD
语种	英语
WOS关键词	Meteorology & Atmospheric Sciences
WOS研究方向	Science & Technology
WOS类目	METEOROLOGY ATMOSPHERIC SCIENCES
CSCD记录号	CSCD:6435020
引用统计	被引频次：4[CSCD] [CSCD记录]
文献类型	期刊论文
专题	任务一_子任务一循证社会科学证据集成任务一
推荐引用方式 GB/T 7714	. 陆面模式中氮循环过程的引入Ⅰ:模式介绍及站点验证[J]. 大气和海洋科学快报,2019,12(1):50-57.
APA	(2019).陆面模式中氮循环过程的引入Ⅰ:模式介绍及站点验证.大气和海洋科学快报,12(1),50-57.
MLA	"陆面模式中氮循环过程的引入Ⅰ:模式介绍及站点验证".大气和海洋科学快报 12.1(2019):50-57.