Terrestrial and marine dynamics on the brink of the Messinian salinity crisis: A wet scenario from the northern Mediterranean

Global and Planetary Change, Journal Year: 2024, Volume and Issue: 233, P. 104362 - 104362

Published: Jan. 18, 2024

The ongoing debate on the causes and modalities of Messinian Salinity Crisis (MSC) from 5.971 Ma needs to be implemented by an in-depth knowledge events changes, a global regional scale, that have preceded its onset. Here we use palynological (pollen dinocysts) micropaleontological (foraminifers calcareous nannoplankton) quantitative analyses Govone sedimentary succession (Northern Italy, western Mediterranean) reconstruct cyclical changes in atmosphere, surface, deep-water hydrographic conditions during Late Miocene, prior onset MSC (from ca 6.6 Ma) across it (up 5.96 Ma). On land, plant communities were dominated arboreal life forms typical warm humid conditions. However, mid- high altitude coniferous taxa attest sequence cold cool conditions, some coinciding with glacial obliquity-controlled phases, notably those (i.e. TG34 TG32). Dominant trees Taxodioideae, especially freshwater swamps, phases. latter alternate relatively less warm, phases characterised reduction according precession-controlled cyclicity (sapropel-marl couplets). absence any significant expansion herbaceous cover is evidence no substantial increases aridity at insolation minima. In marine realm, cycles correspond prevalent alternations between water, oligotrophic (sapropel, maxima) eutrophic (marls, minima) progressive decrease oceanic/outer neritic dinocyst taxa, along more continuous occurrence inner ones, confirm restriction Mediterranean Atlantic connections, despite oceanic influxes, latest 6.14 6.05 Ma. other hand, episodes, dinocysts, does not exclude possible connections Paratethys, 6.18 6.07 All nannoplankton foraminifera apparently disappear record before MSC, 6.02 Ma; however, dinocysts allow documentation history pre-evaporitic up beginning onset, when lagoons, marked frequent salinity expanded zone intermediate depth basin, 60 kyrs. Plant assemblages long-lasting increase seasonality 6.2 as well peculiar inversion dominant vegetal patterns sapropel-marl couplets, Ma, corresponding uppermost four cycles. environment, after possibly promoted atmospheric reduced vs enhanced activity storm-track phase precession. This, turn, regulated amounts runoff Northern Italian sectors Alps.

Language: Английский

---

Including Methane Emissions from Agricultural Ponds in National Greenhouse Gas Inventories

Environmental Science & Technology, Journal Year: 2024, Volume and Issue: 58(19), P. 8349 - 8359

Published: May 2, 2024

Agricultural ponds are a significant source of greenhouse gases, contributing to the ongoing challenge anthropogenic climate change. Nations encouraged account for these emissions in their national gas inventory reports. We present remote sensing approach using open-access satellite imagery estimate total methane from agricultural that (1) monthly fluctuations surface area individual ponds, (2) rates historical accumulation and (3) temperature dependence emissions. As case study, we used this method inform 2024 National Greenhouse Gas Inventory reports submitted by Australian government, compliance with Paris Agreement. Total annual increased 58% 1990 (26 kilotons CH4 year–1) 2022 (41 year–1). This increase is linked water growing 51% between (115 kilo hectares; 1,150 km2) (173 1,730 km2). In Australia, 16,000 new built annually, expanding methane-emitting surfaces 1,230 ha yearly (12.3 km2 On average, flux Australia 0.238 t ha–1 year–1. These results offer policymakers insights into developing targeted mitigation strategies curb specific forms For instance, financial incentives, such as carbon or biodiversity credits, can mobilize widespread investments toward reducing enhancing ecological environmental values ponds. Our data modeling tools available on free cloud-based platform other countries adopt approach.

Language: Английский

---

Integrating plant growth microorganisms in potato farming reduce soil CO₂ emissions and improve crop quality

Soil Use and Management, Journal Year: 2025, Volume and Issue: 41(1)

Published: Jan. 1, 2025

Abstract Current horticultural practices typically require high demands of fertilizers, leading to significant environmental impacts and increased production costs. Alternatives based on microbial inoculants have garnered considerable interest owing their potential enhance soil quality whilst reducing external inputs costs, all without compromising productivity. This study aimed compare the impact four fertilizer application strategies, including mineral fertilizers inoculants, crop yield, fertility functionality greenhouse gas emissions in potato Southern Spain. Four treatments were tested: (i) added meet crop's nutritional needs (F100); (ii) a 50% reduction F100 rate (F50); (iii) combined with formulation containing nutrient‐solubilizing bacteria, nitrogen‐fixing bacteria non‐mycorrhizal fungi (BAI+FU) (iv) N, P K solubilizing (BAII). Results showed that yield was unaffected by different treatments. However, mean tuber weight firmness significantly higher under BAI+FU treatment, indicating improved product quality. CO 2 release rates decreased 25%, 34% 42% F50, BAII treatments, respectively, compared F100. The N O CH 4 or nutrient contents not affected except for ammonium content, which highest treatment. Additionally, overall bacterial fungal abundance affected, treatment resulted number nirK (denitrification) cbbL (carbon fixation) gene copies. Therefore, combining biofertilizers reduced chemical could represent sustainable strategy mitigating climate change enhancing production.

Language: Английский

---

Research Status and Development Trend of Greenhouse Gas in Wetlands: A Bibliometric Visualization Analysis

Ecology and Evolution, Journal Year: 2025, Volume and Issue: 15(2)

Published: Feb. 1, 2025

With the intensification of global warming, wetland greenhouse gas (GHG) emissions have attracted worldwide attention. However, scientific understanding GHGs is still limited. To gain a comprehensive and systematic current research status development trends in GHGs. We selected 1627 papers related to GHG from Web Science Core Collection database used bibliometric visualization analysis method reveal annual publication, main core forces, hotspots, this field. The results showed that field shows steady upward trend. United States institutions scholars play key role on "climate change" based three major (carbon dioxide (CO2), methane (CH4), nitrous oxide (N2O)) has been continuously gaining popularity. In recent years, "water" become an emerging topic. More more studies focused enhancing pollutant treatment capacity, improving ecosystem productivity, maintaining water level stability, strengthening blue carbon sink function, exploring remote sensing applications wetlands, promoting restoration reduce emissions. Furthermore, we discussed influencing factors emission CO2, CH4, N2O wetlands summarized potential methods findings provide guidance reference sustainable reduction.

Language: Английский

---

Divergent Responses of CH₄ Emissions and Uptake to Global Change Drivers

Global Biogeochemical Cycles, Journal Year: 2025, Volume and Issue: 39(3)

Published: March 1, 2025

Abstract Global changes strongly affect methane (CH 4 ) emissions and uptake. However, it is unclear how CH uptake across rice paddy fields, uplands, natural wetlands are affected by global change drivers, including nitrogen (N) addition, elevated carbon dioxide (eCO 2 ), warming (W), precipitation (P). Here, we collected 1,250 observations of manipulated experiments from 303 publications during 1980–2020, encompassing 1,154 single‐factor 96 two‐paired experiments, analyzed the effects drivers on Results showed were stimulated eCO , W, increased P (IP). was inhibited N IP but significantly enhanced W decreased P. The combined four (−9[−12, −6] %) (13[7, 19] %). Two‐factor interactions reduced (−15[−27, −1] insignificantly (−10[−19, 0] interactive any two mostly antagonistic. Random forest analysis indicated that important factors affecting responses or to different varied. structural equation model confirmed climate, soil properties, wetness index consistently played a remarkable role in regulating drivers. This synthesis highlights an urgent need consider individual multiple for better understanding methane‐climate feedback.

Language: Английский

---

Field Warming‐Based Observations Reveal Constrained Apparent Temperature Sensitivities of Cropland N₂O Emissions

Journal of Geophysical Research Atmospheres, Journal Year: 2025, Volume and Issue: 130(8)

Published: April 11, 2025

Abstract The response of nitrous oxide (N 2 O) emissions to warming is critical for accurately projecting nitrogen‐climate feedback. Compelling evidences have shown that N O are temperature dependent, offering insights into their intrinsic sensitivity. However, when extrapolating from laboratory‐controlled field‐ambient conditions, it remains unclear how this sensitivity varied across cropland fields subject diverse environmental and anthropogenic constraints. We performed a comprehensive meta‐analysis 144 field‐warming observations worldwide, aiming address the magnitude, heterogeneity, drivers such apparent results showed mean growing‐season field‐scale were not strongly dependent with low averaged activation energy (0.32 eV) compared laboratory‐scale (0.62 eV). At site levels, spatial variation in was primarily driven by interactions nitrogen fertilization, edaphic, climatic variables. This analysis also identified crucial yet frequently overlooked role soil pH nonlinearly modulating Our findings provide evidence understanding climate feedback capturing soil‐climate‐management constrained highlight importance incorporating these constraints models improve prediction accuracy.

Language: Английский

---

More enhanced non-growing season methane exchanges under warming on the Qinghai-Tibetan Plateau

The Science of The Total Environment, Journal Year: 2024, Volume and Issue: 917, P. 170438 - 170438

Published: Jan. 28, 2024

Language: Английский

---

Multiple-model based simulation of urban atmospheric methane concentration and the attributions to its seasonal variations: a case study in Hangzhou megacity, China

Environmental Pollution, Journal Year: 2024, Volume and Issue: 361, P. 124781 - 124781

Published: Aug. 23, 2024

Language: Английский

---

Spatio-temporal variations of atmospheric methane and its response to climate on the Tibetan Plateau from 2010 to 2022

Atmospheric Environment, Journal Year: 2023, Volume and Issue: 314, P. 120088 - 120088

Published: Sept. 14, 2023

Language: Английский

---

Significant Daily CO2 Source–Sink Interchange in an Urbanizing Lake in Southwest China

Water, Journal Year: 2023, Volume and Issue: 15(19), P. 3365 - 3365

Published: Sept. 25, 2023

Inland lake water–air interfaces, particularly the partial pressure of CO2 (pCO2), have become key parameters in study global carbon cycle changes. However, there are few studies on short-term daily variations pCO2 urbanizing lakes. The fluctuations and fluxes (fCO2) were monitored biweekly on-site for assessments during daytime hours (7:00–17:00 CST) from January to September 2020 an located Southwest China. We found a pronounced uninterrupted decline average levels fCO2 7:00 17:00 CST. Notably, mornings (7:00–12:00 exhibited substantially elevated values compared afternoons. Specifically, 7:00, mean at CST decreased by ca. 74% 112%, respectively. was 707 ± 642 μatm, significantly higher than typical atmospheric 380–420 while 9 January, 1 April, 27 July lower CO2. Each month, all water environmental showed significant differences. reached maximums September; temperature turbidity increased; pH, dissolved oxygen transparency markedly decreased. Additionally, correlation between factors demonstrated that nutrient levels, oxygen, transparency/turbidity had roles dynamics this lake. Therefore, could serve as source sink daytime.

Language: Английский

---