Cristin-resultat-ID: 1975251
Sist endret: 21. februar 2022, 09:36
NVI-rapporteringsår: 2021
Resultat
Vitenskapelig artikkel
2021

Global maps of soil temperature

Bidragsytere:
  • Jonas J. Lembrechts
  • Johan van den Hoogen
  • Juha Aalto
  • Michael B. Ashcroft
  • Pieter De Frenne
  • Julia Kemppinen
  • mfl.

Tidsskrift

Global Change Biology
ISSN 1354-1013
e-ISSN 1365-2486
NVI-nivå 2

Om resultatet

Vitenskapelig artikkel
Publiseringsår: 2021
Publisert online: 2021
Volum: 00
Sider: 1 - 35
Open Access

Importkilder

Scopus-ID: 2-s2.0-85123931737

Klassifisering

Vitenskapsdisipliner

Zoologiske og botaniske fag

Beskrivelse Beskrivelse

Tittel

Global maps of soil temperature

Sammendrag

Research in global change ecology relies heavily on global climatic grids derived from estimates of air temperature in open areas at around 2 m above the ground. These climatic grids do not reflect conditions below vegetation canopies and near the ground surface, where critical ecosystem functions occur and most terrestrial species reside. Here, we provide global maps of soil temperature and bioclimatic variables at a 1-km² resolution for 0–5 and 5–15 cm soil depth. These maps were created by calculating the difference (i.e., offset) between in-situ soil temperature measurements, based on time series from over 1200 1-km² pixels (summarized from 8500 unique temperature sensors) across all the world’s major terrestrial biomes, and coarse-grained air temperature estimates from ERA5-Land (an atmospheric reanalysis by the European Centre for Medium-Range Weather Forecasts). We show that mean annual soil temperature differs markedly from the corresponding gridded air temperature, by up to 10°C (mean = 3.0 ± 2.1°C), with substantial variation across biomes and seasons. Over the year, soils in cold and/or dry biomes are substantially warmer (+3.6 ± 2.3°C) than gridded air temperature, whereas soils in warm and humid environments are on average slightly cooler (-0.7 ± 2.3°C). The observed substantial and biome-specific offsets emphasize that the projected impacts of climate and climate change on near-surface biodiversity and ecosystem functioning are inaccurately assessed when air rather than soil temperature is used, especially in cold environments. The global soil-related bioclimatic variables provided here are an important step forward for any application in ecology and related disciplines. Nevertheless, we highlight the need to fill remaining geographic gaps by collecting more in-situ measurements of microclimate conditions to further enhance the spatiotemporal resolution of global soil temperature products for ecological applications.

Bidragsytere

Jonas J. Lembrechts

  • Tilknyttet:
    Forfatter
    ved Universiteit Antwerpen

Johan van den Hoogen

  • Tilknyttet:
    Forfatter
    ved Ilmatieteen laitos
  • Tilknyttet:
    Forfatter
    ved Eidgenössische Technische Hochschule Zürich

Juha Aalto

  • Tilknyttet:
    Forfatter
    ved Helsingin yliopisto / Helsingfors universitet

Michael B. Ashcroft

  • Tilknyttet:
    Forfatter
    ved University of Wollongong
  • Tilknyttet:
    Forfatter
    ved Australian Museum

Pieter De Frenne

  • Tilknyttet:
    Forfatter
    ved Universiteit Gent
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