Le climat – Réfléxions
NOAA State of the climate
Anomaliea spatiales et temporelles qui influencent la circulation atmosphérique
- Arctic Oscillation (AO)
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Information on the Arctic Oscillation (AO), a large scale mode of climate variability, also referred to as the Northern Hemisphere annular mode.
- El Niño/Southern Oscillation (ENSO)
- El Niño/Southern Oscillation
Information on the El Nino Southern Oscillation (ENSO), a periodic fluctuation in sea surface temperature and air pressure in the equatorial Pacific Ocean.
- Sea Surface Temperatures (SST)
SST anomalies for several commonly-known ENSO regions
- Outgoing Longwave Radiation (OLR)
This OLR product is a proxy for convective precipitation in the western equatorial Pacific
- Southern Oscillation Index (SOI)
Information on the Southern Oscillation Index (SOI), a standardized index based on the observed sea level pressure differences between Tahiti and Darwin, Australia.
- Sea Level Anomalies
- TAO/Triton Data Display
- Sea Surface Temperatures (SST)
- North Atlantic Oscillation (NAO)
Information on the North Atlantic Oscillation (NAO) index, which is based on the surface sea-level pressure difference between the Subtropical (Azores) High and the Subpolar Low.
- Pacific Decadal Oscillation (PDO)
Information on the Pacific Decadal Oscillation (PDO), often described as a long-lived El Nino-like pattern of Pacific climate variability.
- Pacific-North America Index (PNA)
Information the Pacific-North America (PNA) pattern, one of the most prominent modes of low-frequency variability in the Northern Hemisphere extratropics, appearing in all months except June and July.
IMPACT
Climat – observatoire mondial
Les 3 centre de références
NASA, NOAA and UK Met Office
Nasa | Noaa | UK Met Office
This visualization illustrates Earth’s long-term warming trend, showing temperature changes from 1880 to 2015 as a rolling five-year average. Orange colors represent temperatures that are warmer than the 1951-80 baseline average, and blues represent temperatures cooler than the baseline.
Credits: GSFC Scientific Visualization Studio
OMM – Presse
ORGANISATION METEOROLOGIQUE MONDIALE
Communiqué de Presse | Lien |
Perspectives Fin 2016. INFO-NIÑO/NIÑA: Situation actuelle et perspectives
Publish Date: 19 octobre 2016
HadCRUT4
HadCRUT4
Ressource : http://www.metoffice.gov.uk/hadobs/hadcrut4/
Update: Version HadCRUT.4.5.0.0 is now available. Release notes for this version can be found here.
HadCRUT4 is a gridded dataset of global historical surface temperature anomalies relative to a 1961-1990 reference period. Data are available for each month since January 1850, on a 5 degree grid. The dataset is a collaborative product of the Met Office Hadley Centre and the Climatic Research Unit at the University of East Anglia.
Brief description of the data
The gridded data are a blend of the CRUTEM4 land-surface air temperature dataset and the HadSST3 sea-surface temperature (SST) dataset. The dataset is presented as an ensemble of 100 dataset realisations that sample the distribution of uncertainty in the global temperature record given current understanding of non-climatic factors affecting near-surface temperature observations. This ensemble approach allows characterisation of spatially and temporally correlated uncertainty structure in the gridded data, for example arising from uncertainties in methods used to account for changes in SST measurement practices, homogenisation of land station records and the potential impacts of urbanisation.
The HadCRUT4 data are neither interpolated nor variance adjusted.
Serveur Metar Synop Monde – OGIMET
L’outil de référence pour l’extraction des Metar et Synop mondiaux.
Serveur images Sat_Monde
Serveur d’images sat sur le monde entier
Zooms régionaux
Analyse et previ USA atl nord
Analyse et carte USA
MARINE FORECAST , NOAA
Analyse 00H00 UTC
Analyse 06H00 UTC
Analyse 12H00 UTC
Analyse 18H00 UTC
Analyse Atlantique ouest 00H00 UTC, 06H00 UTC, 12H00 UTC, 18H00 UTC.
Climate spirals
Une infographie sur le changement climatique qui a le mérite d’être simple à illustrer la problématique sur le climat.
Resssource : http://www.climate-lab-book.ac.uk/2016/
dans sa version originale.
3 Dimensions
Le temps en ordonnée
Illustration construire à partir de : HadCRUT4.4 from January 1850 – March 2016, relative to the mean of 1850-1900, here
FAQ:
1. Features you can see:
1877-78: strong El Nino event warms global temperatures
1880s-1910: small cooling, partially due to volcanic eruptions
1910-1940s: warming, partially due to recovery from volcanic eruptions, small increase in solar output and natural variability
1950s-1970s: fairly flat temperatures as cooling sulphate aerosols mask the greenhouse gas warming
1980-now: strong warming, with temperatures pushed higher in 1998 and 2016 due to strong El Nino events
The colour scale used is called ‘viridis’
Analyse et prévision Amérique du Nord
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