Extreme degradation of alpine wet meadow decelerates soil heat transfer by preserving soil organic matter on the Qinghai–Tibet Plateau

Journal of Hydrology, Journal Year: 2025, Volume and Issue: unknown, P. 132748 - 132748

Published: Jan. 1, 2025

Language: Английский

---

Insights into runoff changes in the source region of Yellow River under frozen ground degradation

Journal of Hydrology, Journal Year: 2022, Volume and Issue: 617, P. 128892 - 128892

Published: Dec. 15, 2022

Language: Английский

---

Estimation of Permafrost Ground Ice to 10 m Depth on the Qinghai‐Tibet Plateau

Permafrost and Periglacial Processes, Journal Year: 2024, Volume and Issue: 35(3), P. 423 - 434

Published: March 21, 2024

ABSTRACT Permafrost ground ice melting could alter hydrological processes in cold regions by releasing water. Currently, there is a lack of gridded data from the Qinghai‐Tibet Plateau (QTP). Using 664 borehole sample records, we applied random forest (RF) method to predict content permafrost between 2 and 10 m depth three layers (2–3, 3–5, 5–10 m) at spatial resolution 1 km. The RF predictions demonstrated an R value exceeding 0.80 for all with negligible positive overestimation (0.98%–1.85%). first layer (2–3 can be predicted primarily using climate variables, but contribution terrain soil variables increases as increases. total water storage across QTP (2–10 depth) approximately 3330.0 km 3 , 403.5 2–3 layer, 857.2 3–5 2069.3 layer. This study generated time dataset shallow entire which used improve simulations regions.

Language: Английский

---

Hydrological, thermal and chemical influence of an intact rock glacier discharge on mountain stream water

The Science of The Total Environment, Journal Year: 2023, Volume and Issue: 876, P. 162777 - 162777

Published: March 10, 2023

Language: Английский

---

Remotely sensed lake area changes in permafrost regions of the Arctic and the Tibetan Plateau between 1987 and 2017

The Science of The Total Environment, Journal Year: 2023, Volume and Issue: 880, P. 163355 - 163355

Published: April 6, 2023

Language: Английский

---

Potential radon risk in permafrost regions of the Northern Hemisphere under climate change: A review

Earth-Science Reviews, Journal Year: 2024, Volume and Issue: 250, P. 104684 - 104684

Published: Jan. 19, 2024

Language: Английский

---

Regime shifts in Arctic terrestrial hydrology manifested from impacts of climate warming

˜The œcryosphere, Journal Year: 2024, Volume and Issue: 18(3), P. 1033 - 1052

Published: March 5, 2024

Abstract. Anthropogenic warming in the Arctic is causing hydrological cycle intensification and permafrost thaw, with implications for flows of water, carbon, energy from terrestrial biomes to coastal zones. To better understand likely impacts these changes, we used a hydrology model driven by meteorological data atmospheric reanalysis two global climate models period 1980–2100. The accounts soil freeze–thaw processes was applied across pan-Arctic drainage basin. simulations point greater changes over northernmost areas basin underlain western Arctic. An acceleration simulated river discharge recent past commensurate trends drawn observations reported other studies. Between early-century (2000–2019) late-century (2080–2099) periods, indicate an increase annual total runoff 17 %–25 %, while proportion emanating subsurface pathways projected 13 %–30 largest noted summer autumn permafrost. Most notably, contributions shift northern parts Basin that contain amounts carbon. Each season sees runoff; spring only where surface dominates rise runoff, experiences decline despite component. are seen exists support notion increased thaw shifting more flow. manifestations warming, intensification, will impact environments through altered materials they transport.

Language: Английский

---

Permafrost degradation and its consequences for carbon storage in soils of Interior Alaska

Biogeochemistry, Journal Year: 2024, Volume and Issue: 167(3), P. 199 - 223

Published: March 9, 2024

Abstract Permafrost soils in the northern hemisphere are known to harbor large amounts of soil organic matter (SOM). Global climate warming endangers this stable carbon (SOC) pool by triggering permafrost thaw and deepening active layer, while at same time progressing formation. But depending, e.g., on ice content or drainage, conditions degraded can range from water-saturated/anoxic dry/oxic, with concomitant shifts SOM stabilizing mechanisms. In field study Interior Alaska, we investigated two sites featuring permafrost, one water-saturated other well-drained, alongside a third site intact permafrost. Soil aggregate- density fractions highlighted that promoted macroaggregate formation, amplified incorporation particulate matter, topsoils both degradation sites, thus potentially counteracting decrease topsoil SOC induced thawing. However, subsoils were found store notably less than all sites. Our investigations revealed up net 75% smaller storage upper 100 cm as compared one, predominantly related subsoils, differences between wet dry landscapes minor. This provides evidence consideration different employment fractionation techniques is useful combination investigate development stabilization processes sensitive ecosystem.

Language: Английский

---

Contribution of ground ice melting to the expansion of Selin Co (lake) on the Tibetan Plateau

˜The œcryosphere, Journal Year: 2022, Volume and Issue: 16(7), P. 2745 - 2767

Published: July 14, 2022

Abstract. Selin Co, located within permafrost regions surrounded by glaciers, has exhibited the greatest increase in water storage among all lakes on Tibetan Plateau over last 50 years. Most of increased lake volume been attributed to precipitation and accelerated melting glacier ice, but these processes are still not sufficient close budget with expansion Co. Ground ice meltwater released thawing due continuous climate warming past several decades is regarded as another source expansion. This study presents first attempt quantify contribution ground Co evaluating surface deformation. We monitored spatial distribution deformation basin using small baseline subset (SBAS) interferometric synthetic aperture radar (InSAR) technique compared results findings field surveys. Then, watershed was calculated based cumulated settlement. Finally, this change during same period, ratio derived. SBAS-InSAR monitoring 2017–2020 illustrated widespread large subsidence upstream section Zhajiazangbu subbasin, where present. The terrain rate normally between 5 20 mm a−1, indicating rapid loss region. at a ∼57×106 m3 ∼485×106 a−1 contributing ∼12 % increase. contributes explaining equilibrating balance scale. More importantly, proposed method can be extended other watersheds underlain help understanding hydrological changes watersheds.

Language: Английский

---

Chapter 2: Consequences of climate change for the cryosphere in the Hindu Kush Himalaya

Published: June 20, 2023

Chapter 2 of the Water, ice, society, and ecosystems in HKH (HI-WISE) assessment report provides an overview changing climate Hindu Kush Himalayan (HKH) region observed projected impacts on cryosphere. The glaciers are to lose 30%–50% their volume by 2100 even if global warming remains below 2°C. Snow cover is fall up a quarter under high emissions scenarios – drastically reducing freshwater for major rivers. finds that glacier mass loss has accelerated 65% region, rising from –0.17 –0.28m per year water equivalent decades starting 2000 2010. Karokoram Anomaly ended. effects cryosphere fragile mountain habitats be acute, with cascading disasters reported most affecting inhabitant species.

Language: Английский

---