Global Warming-Driven Decline in Phytoplankton Biomass in the Tropical Pacific Identified From Satellite Records

IF 3.5 3区环境科学与生态学 Q2 ENVIRONMENTAL SCIENCES

Journal of Geophysical Research: Biogeosciences Pub Date : 2025-07-10 DOI:10.1029/2025JG008743

Lei Lin, Dongdong Xiang, Dongyan Liu

{"title":"Global Warming-Driven Decline in Phytoplankton Biomass in the Tropical Pacific Identified From Satellite Records","authors":"Lei Lin, Dongdong Xiang, Dongyan Liu","doi":"10.1029/2025JG008743","DOIUrl":null,"url":null,"abstract":"<p>Phytoplankton biomass in tropical oceans is expected to decline because of global warming; however, there exists uncertainty because the satellite records for trend analysis are not long enough to overcome the interference of natural climate variability. Utilizing multiple regression models, we mitigated the influence of natural climate variability on trend analysis of satellite-derived chlorophyll-a (Chl-a, a proxy for phytoplankton biomass) in the tropical Pacific from 1997 to 2023, revealing a long-term Chl-a decline trend at a rate of approximately −0.4%/yr. Global warming contributed to the decline at a rate of −14.5%/°C. The tropical North Pacific (TNP) experienced a faster decline than the tropical South Pacific, which is highly related to asymmetrical hemispheric warming leading to enhanced sea surface warming and weakened trade winds in the TNP. This study provides robust estimates of the global warming-driven trend in tropical marine phytoplankton biomass, thereby contributing to predictions of future changes in marine ecosystems.</p>","PeriodicalId":16003,"journal":{"name":"Journal of Geophysical Research: Biogeosciences","volume":"130 7","pages":""},"PeriodicalIF":3.5000,"publicationDate":"2025-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Geophysical Research: Biogeosciences","FirstCategoryId":"93","ListUrlMain":"https://agupubs.onlinelibrary.wiley.com/doi/10.1029/2025JG008743","RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"ENVIRONMENTAL SCIENCES","Score":null,"Total":0}

引用次数: 0

Abstract

Phytoplankton biomass in tropical oceans is expected to decline because of global warming; however, there exists uncertainty because the satellite records for trend analysis are not long enough to overcome the interference of natural climate variability. Utilizing multiple regression models, we mitigated the influence of natural climate variability on trend analysis of satellite-derived chlorophyll-a (Chl-a, a proxy for phytoplankton biomass) in the tropical Pacific from 1997 to 2023, revealing a long-term Chl-a decline trend at a rate of approximately −0.4%/yr. Global warming contributed to the decline at a rate of −14.5%/°C. The tropical North Pacific (TNP) experienced a faster decline than the tropical South Pacific, which is highly related to asymmetrical hemispheric warming leading to enhanced sea surface warming and weakened trade winds in the TNP. This study provides robust estimates of the global warming-driven trend in tropical marine phytoplankton biomass, thereby contributing to predictions of future changes in marine ecosystems.

Abstract Image

查看原文本刊更多论文

卫星记录显示全球变暖导致热带太平洋浮游植物生物量下降

由于全球变暖，热带海洋的浮游植物生物量预计将下降；然而，由于用于趋势分析的卫星记录时间不够长，无法克服自然气候变率的干扰，因此存在不确定性。利用多元回归模型，减轻了自然气候变率对1997 - 2023年热带太平洋浮游植物生物量的卫星衍生叶绿素-a （Chl-a）趋势分析的影响，揭示了长期的Chl-a下降趋势，其速率约为- 0.4%/年。全球变暖以- 14.5%/°C的速度造成了这种下降。热带北太平洋（TNP）的下降速度快于热带南太平洋，这与半球不对称变暖导致海面变暖加剧和TNP信风减弱密切相关。这项研究为全球变暖驱动的热带海洋浮游植物生物量趋势提供了可靠的估计，从而有助于预测海洋生态系统的未来变化。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

Journal of Geophysical Research: Biogeosciences Earth and Planetary Sciences-Paleontology

CiteScore

6.60

自引率

5.40%

发文量

242

期刊介绍： JGR-Biogeosciences focuses on biogeosciences of the Earth system in the past, present, and future and the extension of this research to planetary studies. The emerging field of biogeosciences spans the intellectual interface between biology and the geosciences and attempts to understand the functions of the Earth system across multiple spatial and temporal scales. Studies in biogeosciences may use multiple lines of evidence drawn from diverse fields to gain a holistic understanding of terrestrial, freshwater, and marine ecosystems and extreme environments. Specific topics within the scope of the section include process-based theoretical, experimental, and field studies of biogeochemistry, biogeophysics, atmosphere-, land-, and ocean-ecosystem interactions, biomineralization, life in extreme environments, astrobiology, microbial processes, geomicrobiology, and evolutionary geobiology