Paper Harvest Report

Date range: April 14, 2026

4 top-tier papers selected out of 95 total publications

Today’s Highlights

A global analysis in Nature Water reveals that coastal groundwater levels are declining at 87% of monitored sites, with many regions already susceptible to seawater intrusion — a critical threat to freshwater supplies. Meanwhile, a novel satellite-based framework quantifies the evolving flood regulation capacity of the Yangtze River Basin, and an urban land surface model intercomparison exposes large discrepancies in how models simulate surface runoff.

Today’s Highlights
Top-Tier Journal Papers
Statistics
1. Papers by journal
Filtering Criteria

Top-Tier Journal Papers

Marine heatwaves can supercharge cyclones

Authors: Not available

Journal: Nature · DOI: 10.1038/d41586-026-01201-8

Matched topics: marine heatwave

Storms that cross exceptionally warm ocean waters intensify more quickly and do more damage than storms that do not. Storms that cross exceptionally warm ocean waters intensify more quickly and do more damage than storms that do not.

Observation‐Based Spatiotemporal Analysis of the Evolving Flood Regulation Capacity for the Yangtze River Basin

Authors: Junwei Su, Peirong Lin, Kaihao Zheng, Xiangyong Lei, Ziyun Yin, et al.

Journal: Geophysical Research Letters · DOI: 10.1029/2025gl120255

Matched topics: river, flood

The lack of direct observations for flood regulation capacity largely compromises our objective assessment of a basin’s flood mitigation strategies in confronting global change. This study proposes a novel Precipitation‐Inundation Paired Events (PIPE) extraction frame‐work, which employs 3D clustering on daily satellite‐observed inundation data from the Global Flood Monitoring product of the Copernicus Emergency Management Service during 2015–2024. PIPE transforms precipitation‐inundation dynamics into measurable paired events, enabling the derivation of a spatially explicit flood regulation capacity index. Applying PIPE to the Yangtze River Basin — one of the most flood‐prone basins worldwide — reveals divergent trends: the upper reaches show a significant downward trend (weaker regulation), while the middle‐lower reaches exhibit a significant upward trend (stronger regulation), with a turning point identified in 2020. This shift is linked to both climate variability and the evolving operation of the Three Gorges Reservoir. These findings highlight PIPE’s potential to support global flood risk assessment and adaptive water management in a changing climate.

Surface Runoff Discrepancy in Urban‐PLUMBER Land Surface Models

Authors: H. J. Jongen, M. Lipson, A. J. Teuling, S. Grimmond, M. Best, et al.

Journal: Geophysical Research Letters · DOI: 10.1029/2026gl122048

Matched topics: hydrology, runoff, land surface model

Enhanced surface runoff in urban environments reduces water availability and limits the evaporative cooling potential. We evaluate surface runoff in 18 urban land surface models (ULSM) in Urban‐PLUMBER for 6,570 rainfall events across 21 urban sites. Surface runoff occurs when rainfall exceeds the infiltration capacity or when surface storage is exceeded by the rainfall flux, leading to two dominant modes of surface runoff generation. Across all events, IQR spreads of 43% of event precipitation highlight substantial inter‐model disagreement in surface runoff generation. The dominant mode difference explains a key source of disagreement in surface runoff, with the Hortonian mode producing 31% more surface runoff for events >10 mm/h, but less for smaller events. Surface characteristics drive surface runoff in the Hortonian mode, while subsurface characteristics drive the saturation‐excess mode. Insights into the cause of surface runoff disagreement in ULSMs have implications for runoff generation in non‐urban LSMs and hydrological models.

Coastal groundwater-level trends reveal global susceptibility to seawater intrusion

Authors: Annika Nolte, Steffen Bender, Jens Hartmann, Stefan Baltruschat, Nils Moosdorf, et al.

Journal: Nature Water · DOI: 10.1038/s44221-026-00619-8

Matched topics: coastal, freshwater discharge

Coastal groundwater is a vital freshwater source threatened by overabstraction and sea-level rise, yet global patterns of declining groundwater levels and susceptibility to seawater intrusion (SWI) remain poorly constrained. Here we present a global assessment of coastal groundwater-level trends using data from 5,814 monitoring wells within 25 km of coastlines across 58 countries. We find that groundwater levels are declining at 87% of monitored sites, with a median trend of −0.07 m per year. Combining these trends with estimates of the depth to the freshwater–saltwater interface, we identify regions where current groundwater decline rates could induce SWI within decades. The most susceptible regions include parts of East Asia, the western United States, the Middle East and small island developing states. Our findings highlight an urgent need for improved monitoring and management of coastal aquifers globally, as ongoing groundwater depletion increasingly threatens the sustainability of coastal freshwater supplies.

Statistics

Metric	Count
Journals searched	11
Total papers fetched	95
Passed deterministic filter	9
After LLM relevance filtering	4
Rejected (not relevant)	5

Papers by journal

Journal	Papers
Nature	1
Geophysical Research Letters	2
Nature Water	1

Filtering Criteria

Topics: hydrology, hydrologic model, river, runoff, streamflow, reservoir, water management, flood, drought, seasonal, land surface model, climate change, hydropower, surface water, irrigation, earth system model, estuary, coastal, freshwater discharge, river plume, ocean biogeochemistry, marine heatwave, paleohydrology, paleoclimate, Quaternary, Holocene, Pleistocene, fluvial geomorphology, river terrace, loess, drainage network, river capture, landscape evolution, luminescence dating

Fields: engineering, environmental science, computer science, geology, geography