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Four extreme hydrometeorological events in the Pacific Northwest of North America in 2021, including two cold waves, a heat wave and a major flood, impacted freshwater temperatures by as much as 8 °C in parts of the region, according to an analysis of hourly water temperatures at 554 sites.
A large algal bloom in Lake Geneva in 2021 was triggered by a sequence of heavy rainfall followed by wind-induced coastal upwelling, and a prolonged period of warm, calm weather, according to a combination of satellite remote sensing, in-situ measurements and three-dimensional numerical modeling.
Responses of GPT-3.5 and GPT-4 to prompts to list a country’s vulnerability to climate hazards overall agree for floods and cyclones but less for droughts, with fewer errors from GPT-4, indicating a potential to enhance climate literacy, suggests a comparison of responses to hazard risk indices based on data from the IPCC.
Drought-wildfire compound events are increasing in frequency and reduce gross primary production by double compared to drought-only events, suggests a global scale compound analysis of satellite-derived data on drought indicators, wildfire and gross primary production between 2002 and 2020.
The stability of the ice margin in Baffin Bay led to active decentering of sediments in the deep basin and slopes 25,000−15,000 years ago, but as the ice sheet retreated 13,000-11,000 years ago, deposition moved largely toward the shelf, according to radiocarbon records from 79 sediment cores.
Atmospheric carbon dioxide concentrations remained below 840 parts per million and polar regions were glaciated throughout much of the Early Cretaceous except during episodic volcanism, according to an analysis of stable isotope composition of plants and biogenic carbonate data.
Intense rainfall events resulting from strong atmospheric river activity two and three millennia ago exceeded those of the 20th century around Leonard Lake, California, according to a 3,200-year reconstruction of integrated vapor transport derived from sediment geochemical data.
Reductions in groundwater level due to El Niño-induced drought events changed an undrained tropical peat swamp forest from a carbon dioxide sink to a source with cumulative impacts of drainage and smoke haze further enhancing long term emissions, suggest long-term field experiments in Indonesia.
Uncertainties associated with the choice of dry indicators impact future projections of compound hot-dry extremes and are greater than scenario uncertainty in some regions, according to an analysis of different indices from multi-model ensemble simulations.
Iceflow acceleration in Greenland has propagated deep inland, even outside fast-flowing channels, in the region upstream of Jakobshavn Isbrae, according to in-situ measurements at eleven locations with measurements going back to 1959.
Oceanic deoxygenation began about one million years earlier than the marine End-Permian mass extinction, as indicated by variations in magnetic mineral assemblages and geochemical anomalies.
A total of 114,000 ± 9,400 km3 of precipitation falls on land each year with high dataset consensus over tropical, subtropical, and temperate regions, and low agreement over arid and mountain regions, according to an analysis of 17 precipitation datasets over the period 2000-2019.
Climate change effects magnified an intense heat dome over western North America leading to record breaking fire-conducive weather, widespread burning and extreme fire activity in Canada and the United States in July 2021, suggest an analysis of upper air and surface weather.
Nature-based solutions can reduce the immediate risks and impacts of climate change in coastal areas and increase adaptive capacity in the agricultural sector in low- and middle-income countries, according to a systematic review of 363 empirical studies.
The effectiveness of carbon dioxide emission reduction targets increases with the level of the targets’ ambition and countries’ education level and income equality, according to an analysis using an econometric model and emission intensity and socio-economic data for 163 countries over the past decade.
A reduction in sea ice formation associated with weaker deep ocean convection during the Last Interglacial could have triggered an increase in Southern Ocean subsurface temperatures of 2–3 °C and thus potential basal melting of Antarctic ice shelves, according to climate model simulations.
The number of small bubbles at the ice-water interface in a perennially ice-covered lake varies in response to changes in ice thickness leading to seasonal variations in the backscatter detected by synthetic aperture radar, suggests 4-year observational time series from Lake Untersee, Antarctica.
The fire ban implemented during burning seasons in the Brazilian Amazon helped reduce the number of fires in 2019 but proved largely ineffective in 2020 and 2021, according to an analysis of observed fires activity and model simulations of expected fires in the absence of a ban over 2019–2021.
An extensive collapse of the south Scandinavian Caledonides is evident from large-scale folding and shear zones observed in the offshore basement of the North Sea Rift, using modern 3D broadband seismic data.
Methane emissions from agriculture and waste increased between 1990 and 2020 while fossil fuel emissions decreased until 2004 and subsequently stabilised, suggest isotopic observations of methane emissions and atmospheric chemistry modelling.