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Nahel Belgherze Profile picture
@WxNB_
May 22, 2022 • 7 tweets • 7 min read • Read on X
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🌡🔥 Parce que les vagues de #chaleur impactent aussi les mers et océans. Arrêtons-nous un instant sur les importantes anomalies de #température de surface en Méditerranée Occidentale. 𝐌𝐚𝐫𝐢𝐧𝐞 𝐡𝐞𝐚𝐭𝐰𝐚𝐯𝐞 (vague de chaleur océanique) initiée ces dernières semaines. 1/4 Image
🔺Les conséquences des fortes #chaleurs accumulées ces dernières semaines sur l’Ouest de l’#Europe sont désormais bien visibles sur les cartes de #SST. Les anomalies de #température de surface dépassent actuellement les 4°C en #Méditerranée Occidentale ! Carte @ECMWF - 2/4 Image
🔺Si cette #météo marine peut être vue comme une aubaine pour les baigneurs, cet épisode de « canicule marine » en Méd. Occ./Golfe de Gascogne, n’est pourtant pas très bon signe -> Écosystème marin déjà sous pression, limitation de l'effet rafraîchissant des brises de mer..3/4 ImageImage
🌡 Les températures de la surface de la mer avoisinent les 20°C en ce moment en #Méditerranée Occidentale, ~17°C dans le Golfe de Gascogne. Le contraste avec les SST de l’année dernière à la même période est assez saisissant.
Carte @meteociel - 4/4 #ClimateAction cc @BonPote
L’année dernière, à la même période...🤷‍♂️ Sea Surface Temperature Ano...
📈🌡 Evolution fulgurante des #températures de surface de la mer dans le Golfe de Gascogne et #Méditerranée occidentale. Animation des #SST puis #SSTanomaly du 1er mai au 20 mai 2022. Via @podaac (h/t @BonPote @KeraunosObs @BonPote)
SST anomaly puis SST, dans ce sens.

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More from @WxNB_

Nahel Belgherze Profile picture
Dec 17, 2024
High-resolution satellite imagery of the French territory of Mayotte after Cyclone Chido is now available and I'm out of words to describe the devastation. Hundreds are feared dead.

A thread. Image
Image
Mtsapéré, Mayotte. Image
Image
Bandrajou, Mayotte Image
Image
Read 4 tweets
Nahel Belgherze Profile picture
May 10, 2024
BREAKING: Thousands of reports of Northern Lights coming in from multiple locations across Europe. A severe G4 geomagnetic storm is currently affecting Earth. Truly the most stunning aurora show in years. Currently visible as far south as northern Italy. Image
Webcams: foto-webcam.eu
Poland 🇵🇱
Read 10 tweets
Nahel Belgherze Profile picture
Jan 29, 2024
New data collected by the Geospatial Information Authority of Japan reveals that approx. 90 km of the northern Noto Peninsula coastline has shifted offshore, exposing around 4 sq. km. of previously submerged land, following the Jan. 1st M7.6 earthquake.

A short thread.
In other words, Japan has actually gained approximately 4 km² of land area due to this earthquake. For perspective, Central Park in NYC is 3.41 km². On a national scale it's insignificant, but on the scale of a prefecture, it's obviously much more noticeable. Image
According to the official ranking of Japan’s 47 prefectures based on their surface area in km², Ishikawa, which features the most of the Noto Peninsula, is separated from Fukui by only 4.4 km². Coincidentally, this is exactly the area that Ishikawa gained from the sea.

Image
Source: https://www.gsi.go.jp/common/000153121.pdf
Read 8 tweets
Nahel Belgherze Profile picture
Jul 22, 2023
The Mediterranean Sea is heading into uncharted territory. The recent powerful “heat dome” over southern Europe has led to an extremely rapid warming of the waters in the western part of the bassin, with SSTs now exceeding 30°C off the coast of southern Italy.

A short thread. Image
In case you didn’t know, sea surface temperatures usually peaks in late August in the Mediterranean Sea. As you can see from the graphic below, the Med. bassin has never been this warm so early in the year and is likely to break its all-time high in the next few days. Image
As you might expect, SSTs have warmed incredibly fast in the last few days. The recent extreme temperatures in the area has triggered a significant marine heatwave which is now spreading eastwards. Almost the entire Mediterranean basin will be affected.

This is critical.
Read 7 tweets
Nahel Belgherze Profile picture
Feb 9, 2023
Newly available Maxar satellite imagery shows several hundred meters long surface rupture with horizontal displacements up to 4m near Nurdağı, Gaziantep province, Turkey.
Before/After. Grain silos near Nurdağı, Turkey. #TurkeySyriaEarthquake
Here's a zoomed out version. Gaziantep Province is fractured, literally. I will certainly post more images in the next few days. Let's pray for Turkey...
Read 5 tweets
Nahel Belgherze Profile picture
Jan 13, 2023
This Sunday, January 15, will mark one year since the eruption of the Hunga Tonga–Hunga Haʻapai volcano shocked the world. I remember being awestruck by these images.

A short thread.
In the Volcanic Explosivity Index scale, the eruption was rated at least a VEI-5. It was the most powerful eruption since the 1883 eruption of Krakatoa with an estimated eq. TNT yield of 100-200 megatons, more than the Tsar Bomba, the most powerful nuclear weapon ever detonated.
Tonga volcano had the highest plume ever recorded. The column of ash reached almost 58km altitude (36 miles). After one hour, the cloud of volcanic ash was roughly 650km wide. For comparison, that's roughly size of mainland Spain. earthobservatory.nasa.gov/images/149474/…
Read 10 tweets

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