Le climat – Réfléxions

Anomaliea spatiales et temporelles qui influencent la circulation atmosphérique


NOAA https://www.climate.gov/enso

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

Communiqué de Presse | Lien |

Perspectives Fin 2016. INFO-NIÑO/NIÑA: Situation actuelle et perspectives

Publish Date: 19 octobre 2016




Ressource : http://www.metoffice.gov.uk/hadobs/hadcrut4/

Update: Version HadCRUT. 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.

Map of combined land-surface and sea-surface temperature anomalies from HadCRUT4

Analyse et previ USA atl nord

logo_fax_boston_usaAnalyse et carte USA
Analyse 00H00 UTC
Analyse 06H00 UTC
Analyse 12H00 UTC
Analyse 18H00 UTC

Analyse Atlantique ouest 00H00 UTC, 06H00 UTC, 12H00 UTC, 18H00 UTC.

Et la climatologie des productions made in USA

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.

Click for animation

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

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’