Identifying the main drivers of the spatiotemporal variations in wetland methane emissions during 2001–2020 DOI Creative Commons
Yihan Hu, Xu Yue,

Chenguang Tian

et al.

Frontiers in Environmental Science, Journal Year: 2023, Volume and Issue: 11

Published: Oct. 25, 2023

Wetlands act as an important natural source of global methane (CH 4 ). The emission rate wetland CH is jointly affected by climate change, carbon dioxide (CO 2 ) fertilization, and distribution. In this study, we implemented a module into the Yale Interactive Biosphere (YIBs) model to quantify spatiotemporal variations emissions in 2001–2020. Site-level validations showed that YIBs reasonably captures seasonality magnitude at 28 out 33 sites with significantly positive correlations low relative biases. On scale, predicts annual mean 147.5 Tg yr −1 2000–2017, very close estimate 147.9 from ensemble 13 process-based models. Global trend 0.74 −2 past decades, leading increase 7.4 (5.2%) 2008–2017 than 2000–2009. Climate change CO fertilization accounted for over 70% changes. Among them, impact grew steadily became dominant factor after year 2008. most significant changes were located tropical regions following perturbations temperature drives ecosystem productivity. We found limited high latitudes because moderate area fraction. rise poses emerging threat warming likely escalates tropospheric air pollutants.

Language: Английский

Advancements and opportunities to improve bottom-up estimates of global wetland methane emissions DOI Creative Commons
Qing Zhu, Daniel J. Jacob, Kunxiaojia Yuan

et al.

Environmental Research Letters, Journal Year: 2025, Volume and Issue: 20(2), P. 023001 - 023001

Published: Jan. 22, 2025

Abstract Wetlands are the single largest natural source of atmospheric methane (CH 4 ), contributing approximately 30% total surface CH emissions, and they have been identified as uncertainty in global budget based on most recent Global Carbon Project report. High uncertainties bottom–up estimates wetland emissions pose significant challenges for accurately understanding their spatiotemporal variations, scientific community to monitor from space. In fact, there large disagreements between versus top–down inferred inversion concentrations. To address these critical gaps, we review development, validation, applications well how used inversions. These estimates, using (1) empirical biogeochemical modeling (e.g. WetCHARTs: 125–208 TgCH yr −1 ); (2) process-based WETCHIMP: 190 ± 39 (3) data-driven machine learning approach UpCH4: 146 43 ). Bottom–up subject (∼80 Tg ranges different do not overlap, further amplifying overall when combining multiple data products. substantial highlight gaps our biogeochemistry inundation dynamics. Major tropical arctic complexes regional hotspots emissions. However, scarcity satellite over tropics northern high latitudes offer limited information inversions improve estimates. Recent advances measurements fluxes FLUXNET-CH ) across a wide range ecosystems including bogs, fens, marshes, forest swamps provide an unprecedented opportunity existing We suggest that continuous long-term at representative wetlands, fidelity mapping, combined with appropriate framework, will be needed significantly There is also pressing unmet need fine-resolution high-precision observations directed wetlands.

Language: Английский

Citations

1
Precision water recharge facilitates spikelet development and seed growth in Carex schmidtii: Implications for near-natural restoration of degraded semi-arid wetlands DOI

Mingye Zhang,

Shuchen Liu, Guodong Wang

et al.

Journal of Environmental Management, Journal Year: 2025, Volume and Issue: 375, P. 124338 - 124338

Published: Jan. 29, 2025

Language: Английский

Citations

1
Methane and nitrous oxide emissions complicate the climate benefits of teal and blue carbon wetlands DOI
Martino E. Malerba, Daniel A. Friess, Mike Peacock

et al.

One Earth, Journal Year: 2022, Volume and Issue: 5(12), P. 1336 - 1341

Published: Dec. 1, 2022

Language: Английский

Citations

31
Net greenhouse gas balance of fibre wood plantation on peat in Indonesia DOI Creative Commons
Chandra Shekhar Deshmukh, Ari Putra Susanto, Nardi Nardi

et al.

Nature, Journal Year: 2023, Volume and Issue: 616(7958), P. 740 - 746

Published: April 5, 2023

Tropical peatlands cycle and store large amounts of carbon in their soil biomass1-5. Climate land-use change alters greenhouse gas (GHG) fluxes tropical peatlands, but the magnitude these changes remains highly uncertain6-19. Here we measure net ecosystem exchanges dioxide, methane nitrous oxide between October 2016 May 2022 from Acacia crassicarpa plantation, degraded forest intact within same peat landscape, representing land-cover-change trajectories Sumatra, Indonesia. This allows us to present a full plantation rotation GHG flux balance fibre wood on peatland. We find that has lower emissions than site with similar average groundwater level (GWL), despite more intensive land use. The over (35.2 ± 4.7 tCO2-eq ha-1 year-1, standard deviation) were around two times higher those (20.3 3.7 year-1), only half current Intergovernmental Panel Change (IPCC) Tier 1 emission factor (EF)20 for this Our results can help reduce uncertainty estimates, provide an estimate impact develop science-based peatland management practices as nature-based climate solutions.

Language: Английский

Citations

20
Organic Carbon and Lignin Protection by Metal Oxides Versus Silicate Clay: Comparative Study Based on Wetland and Upland Soils DOI
Erxiong Zhu, Zongguang Liu, Simin Wang

et al.

Journal of Geophysical Research Biogeosciences, Journal Year: 2023, Volume and Issue: 128(7)

Published: July 1, 2023

Abstract Mineral binding of organic carbon (OC) is one the key mechanisms promoting soil (SOC) persistence, which vital for long‐term sequestration atmospheric dioxide into soils. However, relative importance two main types minerals ‐ metal oxides and silicate clay—in SOC protection remains unclear, hampering our ability to predict protect this important pool persistent SOC. Here, we analyzed OC bound (OC ) versus clay in soils from contrasting environments (i.e., wetlands uplands) using sequential dissolution by dithionite hydrofluoric acid. We found that % was higher than both uplands, indicating dominance protection. The sum constituted a fraction suggesting an underappreciated role mineral (in particular, oxide) wetland preservation. Furthermore, lignin phenol analysis tandem, ∼23% phenols were additionally released after removal clay, providing potential means assess “hidden” matrices. Given wide use as tracers terrestrial plant‐derived OC, results suggest contribution or sedimentary stocks mineral‐protected deserves reassessment. These findings highlight differential various its components environments, warrants better recognition understanding distribution dynamics

Language: Английский

Citations

19
FT-ICR-MS combined with fluorescent spectroscopy reveals the driving mechanism of the spatial variation in molecular composition of DOM in 22 plateau lakes DOI
Baozhu Pan,

Siwan Liu,

Yeyong Wang

et al.

Environmental Research, Journal Year: 2023, Volume and Issue: 232, P. 116272 - 116272

Published: June 3, 2023

Language: Английский

Citations

17
Emergent methane mitigation and removal approaches: A review DOI Creative Commons
Ishita Mundra, Andrew Lockley

Atmospheric Environment X, Journal Year: 2023, Volume and Issue: 21, P. 100223 - 100223

Published: Nov. 15, 2023

Early control of atmospheric methane is essential to achieving a 1.5 °C warming pathway. This paper considers range academic and gray literature reviews techniques, as starting point for more comprehensive, integrative review. Novel approaches are considered across anthropogenic natural sources; where these lacking, existing discussed. review identifies four principal sectors meriting action research: fugitive emissions in mining, oil & gas; agriculture, including near-term minor interventions later synthetic food production; best practice municipal solid waste wastewater management; sources (e.g., permafrost, clathrates, wetlands). Where abatement impractical, this discusses speculative geoengineering technologies enhancing the •OH •Cl sinks, photocatalysis, adsorbent air capture). Atmospheric removal proposals merit research, but may remain impractical due concentrations lifetime.

Language: Английский

Citations

17
The three-peat challenge: business as usual, responsible agriculture, and conservation and restoration as management trajectories in global peatlands DOI Creative Commons
Nicholas T. Girkin, Paul Burgess, Lydia E. S. Cole

et al.

Carbon Management, Journal Year: 2023, Volume and Issue: 14(1)

Published: Nov. 1, 2023

Peatlands are a globally important carbon store, but peatland ecosystems from high latitudes to the tropics highly degraded due increasingly intensive anthropogenic activity, making them significant greenhouse gas (GHG) sources. Peatland restoration and conservation have been proposed as nature-based solution climate change, by restoring function of peatlands net sink, this may implications for many local communities who rely on income activities associated with transformed peatlands, particularly those drained agriculture. However, without changing way that humans interact exploit in most regions, will continue degrade be lost. We propose there ultimately three potential trajectories management: business usual, whereby sink capacity continues eroded, responsible agricultural management (with mitigate emissions, unlikely restore sink), conservation. term three-peat challenge, it means view benefits environment, well such transitions ecosystem services (particularly provisioning) consequences arising lack action. Ultimately, decisions regarding which given localities follow torequire principles equitable decision-making, support ensure just transitions, their livelihoods.

Language: Английский

Citations

15
Existing wetland conservation programs miss nutrient reduction targets DOI Creative Commons
Shan Zuidema, W. M. Wollheim, Christopher J. Kucharik

et al.

PNAS Nexus, Journal Year: 2024, Volume and Issue: 3(4)

Published: March 28, 2024

Restoring wetlands will reduce nitrogen contamination from excess fertilization but estimates of the efficacy strategy vary widely. The intervention is often described as effective for reducing export watersheds to mediate bottom-level hypoxia threatening marine ecosystems. Other research points necessity applying a suite interventions, including wetland restoration mitigate meaningful quantities export. Here, we use process-based physical modeling evaluate effects two hypothetical, plausible large-scale programs intended nutrient Gulf Mexico. We show that full adoption currently in place can meet little 10% much 60% reduction targets Mexico dead zone. These reductions are lower than prior three reasons. First, net storage leachate subsurface precludes interception and thereby dampens percent decline caused by policy. Unlike previous studies, first constrained riverine fluxes match observed throughout basin. Second, locations many restorable lands geographically disconnected heavily fertilized croplands, limiting runoff. Third, daily resolution model simulations captured seasonal stormflow dynamics inhibit removal because peak effectiveness does not coincide with timing inputs. To improve health efforts eliminate nutrient, loading should be implemented beyond field-margin strategies investigated here.

Language: Английский

Citations

6
The impact of global cropland irrigation on soil carbon dynamics DOI Creative Commons

Xiaochen Yao,

Zhiyu Zhang, Fenghui Yuan

et al.

Agricultural Water Management, Journal Year: 2024, Volume and Issue: 296, P. 108806 - 108806

Published: April 1, 2024

Irrigation can increase crop yields and could be a key climate adaptation strategy. At present, under the background of increasing food demand continuous expansion irrigation cropland, there still uncertainties about soil carbon dynamics change water volume irrigated area in view large-scale spatial heterogeneity. Therefore, this paper uses space-for-time + meta-analysis two-step methodology based on residual trend analysis to quantitatively analyze relationship between organic (SOC) respiration (Rs) response fluctuations land extents. Here we show that within 100–1000 mm had negative impact SOC, was correlated with volume. Different levels manifest distinct effects SOC content across varying depths. When quantities are less than 700 mm, 0–30 cm depth layer surpasses 30–200 layer. Conversely, when equal or exceed pattern is reversed. The overall stock at 0–200 −14.88±6.7%. Tillage, planting intensity, topography, type cropland all exert variable impacts content. Whether these influences deleterious beneficial hinges predominantly upon balance augmentation due heightened inputs from crops reduction through alterations microbial activity. Mann-Kendall showed 2000 2015, Rs an trend, rate 3.67 g/m2/year. global mainly driven by factors (temperature, precipitation solar radiation), while decrease small number areas management practices (fertilizer nitrogen, irrigation, tillage). Our study further quantifies dynamics, thereby offering potential pathways data support for advancement sustainable agriculture.

Language: Английский

Citations

5