Local hourly trends in near-surface and land surface temperatures
Abstract Essential Climate Variables, such as near-surface (T2m) and land surface temperatures (LST), are typically reported in Coordinated Universal Time (UTC) for global consistency. However, their diurnal variability leads to temperature trends that differ by the local hour, a factor not analyzed...
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| Format: | Article |
| Language: | English |
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Nature Portfolio
2025-08-01
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| Series: | Scientific Reports |
| Online Access: | https://doi.org/10.1038/s41598-025-15731-0 |
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| author | Sarah Safieddine Cathy Clerbaux Joaquín Muñoz-Sabater Jean-Noël Thépaut |
| author_facet | Sarah Safieddine Cathy Clerbaux Joaquín Muñoz-Sabater Jean-Noël Thépaut |
| author_sort | Sarah Safieddine |
| collection | DOAJ |
| description | Abstract Essential Climate Variables, such as near-surface (T2m) and land surface temperatures (LST), are typically reported in Coordinated Universal Time (UTC) for global consistency. However, their diurnal variability leads to temperature trends that differ by the local hour, a factor not analyzed on the global nor regional scale. Using ECMWF ERA5-Land reanalysis data (1981–2022), we assess temperature trends by local hour and month. Our results show that the trends can change significantly during the day. LST and T2m warming or cooling trends peak in the afternoon, while showing large spatial variability across both hemispheres. Using MODIS observations, we show how the nominal Equator crossing times of TERRA and AQUA influence LST trends. These findings highlight the necessity of accounting for local time in climate assessments to improve adaptation strategies. |
| format | Article |
| id | doaj-art-e94f2067b02b46ed97384a983f86fecd |
| institution | Kabale University |
| issn | 2045-2322 |
| language | English |
| publishDate | 2025-08-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | Scientific Reports |
| spelling | doaj-art-e94f2067b02b46ed97384a983f86fecd2025-08-20T03:42:25ZengNature PortfolioScientific Reports2045-23222025-08-0115111010.1038/s41598-025-15731-0Local hourly trends in near-surface and land surface temperaturesSarah Safieddine0Cathy Clerbaux1Joaquín Muñoz-Sabater2Jean-Noël Thépaut3LATMOS/IPSL, Sorbonne Université, UVSQ, CNRSLATMOS/IPSL, Sorbonne Université, UVSQ, CNRSEuropean Centre for Medium-range Weather ForecastsEuropean Centre for Medium-range Weather ForecastsAbstract Essential Climate Variables, such as near-surface (T2m) and land surface temperatures (LST), are typically reported in Coordinated Universal Time (UTC) for global consistency. However, their diurnal variability leads to temperature trends that differ by the local hour, a factor not analyzed on the global nor regional scale. Using ECMWF ERA5-Land reanalysis data (1981–2022), we assess temperature trends by local hour and month. Our results show that the trends can change significantly during the day. LST and T2m warming or cooling trends peak in the afternoon, while showing large spatial variability across both hemispheres. Using MODIS observations, we show how the nominal Equator crossing times of TERRA and AQUA influence LST trends. These findings highlight the necessity of accounting for local time in climate assessments to improve adaptation strategies.https://doi.org/10.1038/s41598-025-15731-0 |
| spellingShingle | Sarah Safieddine Cathy Clerbaux Joaquín Muñoz-Sabater Jean-Noël Thépaut Local hourly trends in near-surface and land surface temperatures Scientific Reports |
| title | Local hourly trends in near-surface and land surface temperatures |
| title_full | Local hourly trends in near-surface and land surface temperatures |
| title_fullStr | Local hourly trends in near-surface and land surface temperatures |
| title_full_unstemmed | Local hourly trends in near-surface and land surface temperatures |
| title_short | Local hourly trends in near-surface and land surface temperatures |
| title_sort | local hourly trends in near surface and land surface temperatures |
| url | https://doi.org/10.1038/s41598-025-15731-0 |
| work_keys_str_mv | AT sarahsafieddine localhourlytrendsinnearsurfaceandlandsurfacetemperatures AT cathyclerbaux localhourlytrendsinnearsurfaceandlandsurfacetemperatures AT joaquinmunozsabater localhourlytrendsinnearsurfaceandlandsurfacetemperatures AT jeannoelthepaut localhourlytrendsinnearsurfaceandlandsurfacetemperatures |