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Still at #merdeglace for Day 6 of #7daysoffieldwork to celebrate 10 years of sampling and ~400 subfossil wood samples retrieved from this single moraine ! 🌲💍
#treerings #fieldwork #chamonix
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Melaine Le Roy
7.5K posts
Melaine Le Roy
@subfossilguy
Assiduous dendroglaciologist, moraine lover, wandering geomorphologist, living in the Holocene, climate (and eco-) anxious, @edytem_fr
Katılım Ocak 2020
1.5K Takip Edilen9.2K Takipçiler
Another unseasonal 'summer' day with freezing level above 4100 m asl, i.e. just below Dôme du Goûter (4,304 m) here ! 🥵
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@lisakeb007 @SergeZaka Donc maintenant.
Puisque ces seuils vont etre franchis pour la première fois EN DEHORS DE L'ÉTÉ !
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@subfossilguy @SergeZaka "il faut que la température moyenne nationale soit au- dessus de 25,3°C pendant 1 journée ou alors au-dessus de 23,4°C pendant 3 jours consécutifs"
Donc, été
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The current heatwave in France (see that f**** early outlier!) is an insane statistical anomaly that could become the largest deviation from the norm ever measured ! 😱
Graph @SergeZaka
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Sunset on Aiguille du Midi after a scorching day: max 28.9 at 5 pm in Chamonix! 🔥
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@lisakeb007 @SergeZaka 'Temp. are not higher than seasonal average...' 🤣
Open your window and watch beyond your city!
Don't ask questions you can easily answer by yourself
>Météo France définition of heatwave
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@subfossilguy @SergeZaka So, what exactly determines whether we are having a heatwave?
If temperatures are no higher than the seasonal average, I'd be interested to know what criteria is used
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@lisakeb007 @SergeZaka Heatwave is based on the national thermal index, an objective fact that couldn't care less about how you feel!
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@subfossilguy @SergeZaka I live in the South of France.
No heatwave. Just the start of summer
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What's left of lower Argentière Glacier today... 🧊🔥
Both parts were still connected in 2009!
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The freezing level was at 4,200 meters above sea level over the Alps at midnight on May 24 😱
Everything is normal.
via.@climafluttuante
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@subfossilguy It was snowing a week ago in the alps above about 1600m, did you tweet about that?
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23°C at 9 am in Chamonix... 🥵
Everything is fine (nope) 😱
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Trient Glacier from the Little Ice Age lateral moraine today !
Huge retreat of this glacier tongue... 🧊🔥
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Fruitful fieldwork at Trient Glacier today! 🧊🌲💍
Ten subfossil trees sampled in this wonderful steep and wet moraine gully!
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@jdepocas Nice pic!
Only melange visible here, not the actual glacier front
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Crazy how much ice Viedma Glacier (2nd largest in south America) has lost recently! 🧊😱
Pic from yesterday, where you can see the right margin almost reaching the south tributary valley occupied by Laguna del Viedma (that used to drain into Lago Viedma) 🌊
📷southadventuretrek
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@david_belay Mmmhhh yes.
The retreat of Viedma has given way to the deepest lake in the Americas, reaching a depth of almost 1 km at this very point!
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What is happening now in France is one of the most insane climate event ever! 😲😱
It's a heatwave... in May! 🥵
36-37°C could be reached several days in a row...
34°C in Brittany.
It's 15°C ABOVE NORMAL
We are still in f**** spring!
Dr. Serge Zaka (Dr. Zarge)@SergeZaka
On peut le dire clairement maintenant : nous nous dirigeons vers l’un des événements thermiques les plus spectaculaires jamais observés en France tout mois confondus, totalement hors du champ statistique de ce qui a été connu jusqu’à présent en mai. C’est absolument délirant : ➡️Le record national de chaleur pour un mois de mai pourrait être battu, avec plus de 36-37°C attendus en France pendant PLUSIEURS JOURS. ➡️Les 35°C pourraient remonter jusqu’à la moitié nord du pays, tandis que la Bretagne vivrait une situation totalement hors normes (il ne serait pas étonnant d'y approcher les 34°C !!). Nous sommes à +15°C au-dessus des normes sur la façade Atlantique ! ➡️Lundi, mardi et mercredi pourraient devenir, de très loin, les journées les plus chaudes jamais observées en France en mai, avec plus de 30°C sur la quasi-totalité du territoire. ➡️Des records mensuels pourraient tomber plusieurs jours de suite, y compris sur des stations centenaires, tant l’épisode s’annonce intense et durable : jusqu’à 10 jours possibles. ➡️On est vraiment à la limite des seuils de canicules et de vague de chaleur : nous sommes en mai, au printemps !
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