Predicting Future Trends of Terrestrial Dissolved Organic Carbon Transport to Global River Systems

19602 8 105521 2 320852 document 105521 Earth s Future - 2024 - Nakhavali - Predicting Future Trends of Terrestrial Dissolved Organic Carbon Transport to Global.pdf application/pdf f11c61251fb6bee1984d4d603399711d MD5 1156723 2024-04-10 08:43:46 https://pure.iiasa.ac.at/id/eprint/19602/1/Earth%20s%20Future%20-%202024%20-%20Nakhavali%20-%20Predicting%20Future%20Trends%20of%20Terrestrial%20Dissolved%20Organic%20Carbon%20Transport%20to%20Global.pdf 19602 1 1 application/pdf text en public cc_by_4

Earth s Future - 2024 - Nakhavali - Predicting Future Trends of Terrestrial Dissolved Organic Carbon Transport to Global.pdf

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http://eprints.org/relation/isVersionOf https://pure.iiasa.ac.at/id/document/105521 http://eprints.org/relation/isVolatileVersionOf https://pure.iiasa.ac.at/id/document/105521 http://eprints.org/relation/issmallThumbnailVersionOf https://pure.iiasa.ac.at/id/document/105521 archive 2 disk0/00/01/96/02 2024-04-10 08:49:48 2025-03-12 05:01:09 2024-04-10 08:49:48 article show Nakhavali A. 2392 0000-0003-2675-6730 Lauerwald R. Regnier P. Friedlingstein P. Predicting Future Trends of Terrestrial Dissolved Organic Carbon Transport to Global River Systems pub BNR IBF A fraction of CO2 uptake by terrestrial ecosystems is exported as organic carbon (C) through the terrestrial-aquatic continuum. This translocated C plays a significant role in the terrestrial C balance; however, obtaining global assessments remains challenging due to the predominant reliance on empirical approaches. Leaching of dissolved organic C (DOC) from soils to rivers represents an important fraction of this C export and is assumed to drive a large proportion of the net-heterotrophy of river systems and the related CO2 emissions. Using the model JULES-DOCM, we projected DOC leaching trends over the 21st century based on three scenarios with high (RCP 2.6), intermediate (RCP 4.5), and low (RCP 8.5) climate mitigation efforts. The RCP 8.5 scenario led to the largest DOC leaching increase of +42% to 395 Tg C yr−1 by 2100. In comparison, RCP 2.6 and RCP 4.5 led to increases of 10% and 21%, respectively. Under RCP 8.5, the sub-tropical zone showed the highest relative increase of 50% above current levels. In the boreal and tropical zones, the simulations revealed similar increases of 48% and 41%, respectively. However, given the pre-eminence of the tropics in DOC leaching, the absolute increment is markedly substantial from this region (+59 Tg C yr−1). The temperate zone displayed the lowest relative increase with 35%. Our analysis identified the rising atmospheric CO2 concentration and its fertilizing effect on terrestrial NPP as the main reason for the future increase in DOC leaching. 2024-04-09 doi:10.1029/2023EF004137 3491 public Earth's Future 12 4 e2023EF004137 TRUE 2328-4277 The role of European forests in achieving climate neutrality by 2050 (ForestNavigator, HE 101056875) Climate-Carbon Interactions in the Current Century (4C, H2020 821003) yes info:eu-repo/grantAgreement/EC/HE/101056875/EU//ForestNavigator; info:eu-repo/grantAgreeinfo:eu-repo/grantAgreement/EC/H2020/821003/EU//4C info:eu-repo/semantics/article info:eu-repo/semantics/openAccess