These optical illusions are why butterflies are so hard to catch
Nick Petrić Howe
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共 28 篇,分为 5 组
本期目录
Nick Petrić Howe
Virginia Gewin
James Dinneen
Rachel Fieldhouse
Yong-Young Noh
Jackson Ryan
Ana Cehovin
Andrew T. Chan
James Dinneen
Jose A. Rodriguez
Gemma Conroy
Mercer Eddy
Elie Dolgin
Dariana Isamel Avila-Velasquez
Julian R. Thompson
Chen Zhao
Pierre Regnier
Chris R. Stokes
Abstract The Antarctic Ice Sheet is the largest source of uncertainty in sea-level rise projections, with uncertainties propagating through emissions scenarios, atmosphere–ocean general circulation models, ice-sheet dynamics and sea-level physics. In ice-sheet model intercomparison exercises, these uncertainties—typically attributed to intermodel differences—stem from modelling choices that may bias ensembles towards commonly adopted approaches regardless of observational consistency. Here we quantify how each individual physical assumption cascades into projection uncertainty using a machine-learning emulation framework, which also enables Bayesian calibration against satellite observations to reduce projection bias. Our results suggest it is very likely (≥0.92 probability) that the Anta…
Ali Cheshmehzangi
Oliver Korup
Muhammad Sajjad
David P. Edwards
Abstract Habitat restoration is a cornerstone of global climate and biodiversity policy, with over 350 million ha pledged for restoration by 2030, yet it remains unclear how restoration impacts ‘spill over’ beyond implementation areas. Restoration projects could lead to increased tree loss elsewhere (negative leakage; for example, when restoration replaces timber plantations and/or impacts landowner earnings) or reduced tree loss within project areas and surrounding landscapes (positive leakage; for example, if restoration meets timber or fuelwood resource needs or creates restoration-linked employment). Here we assembled a geospatial dataset of 129,982 restoration polygons (~6.8 million ha) across sub-Saharan Africa to evaluate changes in tree loss across space and time. Natural regenera…
Da Zhang
Iwan Supit
James E. Saiers