陆地生态系统总初级生产力:南亚观测、遥感和建模研究综述

IF 2.8 4区 地球科学 Q3 METEOROLOGY & ATMOSPHERIC SCIENCES
Varsha Pandey, Sakshi Harde, Eswar Rajasekaran, Pramit Kumar Deb Burman
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引用次数: 0

摘要

陆地生态系统在生物量中储存了大量的碳,是一个主要的碳汇。总初级生产力(GPP)衡量陆地生态系统的碳同化率。近几十年来,随着新地面站的安装、稳健模型的开发和地球观测卫星数据的使用,GPP 的精确量化和时空分析已成为各种管理、政策制定和恢复活动的重要指标。由于模型结构和方法、输入的驱动数据、系数和参数以及各种假设,模型估算和卫星数据得出的全球升温潜能值与地面观测值存在很大差异。因此,数据集及其基准之间存在很大的模糊性。此外,生态系统的生产力受生理特征和当地环境条件的制约。本综述概述了调节生产力的环境变量和人为变量,这些变量给 GPP 估算和现有 GPP 产品评估带来了挑战。它还评估了现有的各种 GPP 数据集/产品和估算方法/模型,并比较了南亚地区广泛的自然生态系统和人为改造生态系统的生产力。此外,本研究还包括一项案例研究,评估了全球现有的五种不同时空分辨率的 GPP 产品,如中分辨率成像分光仪 (MODIS)、植被光合作用模型 (VPM)、全球陆地表面卫星 (GLASS)、基于全球 OCO-2 的 SIF 产品 (GOSIF) 和 Penman-Monteith-Leuning (PML),并与涡度协方差通量塔数据进行了比较。结果表明,GOSIF 和 GLASS 数据的性能优于其他 GPP 产品。该研究旨在提供不同生态系统的主要环境条件和碳螯合概况,并协助制定可持续景观管理战略,以减少碳排放和减缓气候变化的影响。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Gross primary productivity of terrestrial ecosystems: a review of observations, remote sensing, and modelling studies over South Asia

Gross primary productivity of terrestrial ecosystems: a review of observations, remote sensing, and modelling studies over South Asia

The terrestrial ecosystem stores a huge amount of carbon in biomass and acts as a major carbon sink. Gross primary productivity (GPP) measures the carbon assimilation rate in terrestrial ecosystems. Accurate quantification and spatiotemporal analysis of GPP have become the essential indicators of various management, policy developments, and restoration activities in recent decades with the installation of new ground stations, development of robust models, and use of Earth Observation satellite data. The model-estimated and satellite data-derived GPP values greatly differ from ground observations due to model structure and approach, input driving data, coefficients and parameters, and various assumptions. Consequently, considerable ambiguity prevails among datasets and their benchmarking. Moreover, the productivity of ecosystems is regulated by physiological traits coupled with the local environmental conditions. This review provides an overview of the environmental and anthropogenic variables that regulate productivity and pose challenges in GPP estimation and evaluation of the available GPP products. It also evaluates the various available GPP datasets/ products and estimation methods/ models and compares the ecosystem productivity in broad natural and human-modified ecosystems in South Asia. Moreover, this study includes a case study on evaluating five globally available GPP products with variable spatiotemporal resolutions, such as the Moderate Resolution Imaging Spectroradiometer (MODIS), the Vegetation Photosynthesis Model (VPM), the Global Land Surface Satellite (GLASS), Global OCO-2-based SIF product (GOSIF), and the Penman-Monteith-Leuning (PML) in three major land cover type of South Asia (forest, cropland, and grassland) comparing with eddy covariance (EC) flux tower data. Results showed a better performance of GOSIF and GLASS data than other GPP products. The study aims to provide an overview of the prevailing environmental conditions and carbon sequestration in different ecosystems and assist in developing sustainable landscape management strategies to reduce carbon emissions and mitigate climate change impact.

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来源期刊
Theoretical and Applied Climatology
Theoretical and Applied Climatology 地学-气象与大气科学
CiteScore
6.00
自引率
11.80%
发文量
376
审稿时长
4.3 months
期刊介绍: Theoretical and Applied Climatology covers the following topics: - climate modeling, climatic changes and climate forecasting, micro- to mesoclimate, applied meteorology as in agro- and forestmeteorology, biometeorology, building meteorology and atmospheric radiation problems as they relate to the biosphere - effects of anthropogenic and natural aerosols or gaseous trace constituents - hardware and software elements of meteorological measurements, including techniques of remote sensing
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