Tim Kalvelage
@timkalvelage.bsky.social
Science journalist & photographer with a PhD in marine biogeochemistry; reporting on ocean, earth, and climate research
www.timkalvelage.de
www.timkalvelage.de
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The expedition aims to answer how the Arctic Ocean looked like during warm periods in Earth's history. Was it ice-free back then? How did the marine ecosystem change? Scientists look for clues to these questions in sediments deposited over hundreds of thousands of years on the Arctic seafloor.
The expedition aims to answer how the Arctic Ocean looked like during warm periods in Earth's history. Was it ice-free back then? How did the marine ecosystem change? Scientists look for clues to these questions in sediments deposited over hundreds of thousands of years on the Arctic seafloor.
September 7, 2025 at 11:00 AM
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The expedition aims to answer how the Arctic Ocean looked like during warm periods in Earth's history. Was it ice-free back then? How did the marine ecosystem change? Scientists look for clues to these questions in sediments deposited over hundreds of thousands of years on the Arctic seafloor.
The expedition aims to answer how the Arctic Ocean looked like during warm periods in Earth's history. Was it ice-free back then? How did the marine ecosystem change? Scientists look for clues to these questions in sediments deposited over hundreds of thousands of years on the Arctic seafloor.
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Back on R/V Kronprins Haakon!
I am currently covering an #expedition with the Norwegian #research icebreaker Kronprins Haakon in the #ArcticOcean. Earlier this week, the ship reached the geographic #NorthPole. Low sea-ice cover allowed for easy passage through the central #Arctic.
Back on R/V Kronprins Haakon!
I am currently covering an #expedition with the Norwegian #research icebreaker Kronprins Haakon in the #ArcticOcean. Earlier this week, the ship reached the geographic #NorthPole. Low sea-ice cover allowed for easy passage through the central #Arctic.
September 7, 2025 at 11:00 AM
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Back on R/V Kronprins Haakon!
I am currently covering an #expedition with the Norwegian #research icebreaker Kronprins Haakon in the #ArcticOcean. Earlier this week, the ship reached the geographic #NorthPole. Low sea-ice cover allowed for easy passage through the central #Arctic.
Back on R/V Kronprins Haakon!
I am currently covering an #expedition with the Norwegian #research icebreaker Kronprins Haakon in the #ArcticOcean. Earlier this week, the ship reached the geographic #NorthPole. Low sea-ice cover allowed for easy passage through the central #Arctic.
Is the #AMOC nearing collapse?
In February, I joined researchers from @bjerknes.uib.no on the icebreaker Kronprins Haakon to the Greenland Sea.
My text and images about their encounters during #Arctic winter and the future of the AMOC:
www.nature.com/articles/d41...
@frontiersmedia.bsky.social
In February, I joined researchers from @bjerknes.uib.no on the icebreaker Kronprins Haakon to the Greenland Sea.
My text and images about their encounters during #Arctic winter and the future of the AMOC:
www.nature.com/articles/d41...
@frontiersmedia.bsky.social
June 18, 2025 at 3:51 PM
Is the #AMOC nearing collapse?
In February, I joined researchers from @bjerknes.uib.no on the icebreaker Kronprins Haakon to the Greenland Sea.
My text and images about their encounters during #Arctic winter and the future of the AMOC:
www.nature.com/articles/d41...
@frontiersmedia.bsky.social
In February, I joined researchers from @bjerknes.uib.no on the icebreaker Kronprins Haakon to the Greenland Sea.
My text and images about their encounters during #Arctic winter and the future of the AMOC:
www.nature.com/articles/d41...
@frontiersmedia.bsky.social
Four days ago, I boarded the Norwegian icebreaker Kronprins Haakon and joined an international team of researchers lead by @bjerknes.bsky.social for an expedition in the #Greenland Sea to study the effects of #Arctic climate change on #ocean circulation.
February 10, 2025 at 7:58 AM
Four days ago, I boarded the Norwegian icebreaker Kronprins Haakon and joined an international team of researchers lead by @bjerknes.bsky.social for an expedition in the #Greenland Sea to study the effects of #Arctic climate change on #ocean circulation.
Vor einigen Monaten in der Zeit veröffentlicht - jetzt noch mal im Wissensmagazin P.M. erschienen: Meine Recherche auf den Malediven, wo Forschende die größte Tigerhai-Population im #Ozean und ein kritisches Habitat für den Schutz der Art entdeckt haben.
#Haie, #Tigerhai, #SharkConservation, #Shark
#Haie, #Tigerhai, #SharkConservation, #Shark
January 24, 2025 at 12:35 PM
Vor einigen Monaten in der Zeit veröffentlicht - jetzt noch mal im Wissensmagazin P.M. erschienen: Meine Recherche auf den Malediven, wo Forschende die größte Tigerhai-Population im #Ozean und ein kritisches Habitat für den Schutz der Art entdeckt haben.
#Haie, #Tigerhai, #SharkConservation, #Shark
#Haie, #Tigerhai, #SharkConservation, #Shark
Die #Tiefsee der #Arktis gehört zu den unbekanntesten Lebensräumen unseres Planeten. Ich habe ein Team um Tiefseeforscherin #AntjeBoetius auf einer Expedition mit der #Polarstern zum #Nordpol begleitet. Jetzt nachzulesen in der aktuellen Ausgabe von @spektrum.de der Wissenschaft.
January 22, 2025 at 10:53 AM
Die #Tiefsee der #Arktis gehört zu den unbekanntesten Lebensräumen unseres Planeten. Ich habe ein Team um Tiefseeforscherin #AntjeBoetius auf einer Expedition mit der #Polarstern zum #Nordpol begleitet. Jetzt nachzulesen in der aktuellen Ausgabe von @spektrum.de der Wissenschaft.
Alkalisches Gesteinsmehl soll die CO2-Aufnahme der Meere im Kampf gegen den #Klimawandel erhöhen. Wie Forschende vom @geomarkiel.bsky.social die Effizienz und ökologischen Folgen der #Ozeanalkalinisierung untersuchen, habe ich fürs Magazin Bild der Wissenschaft aufgeschrieben.
January 22, 2025 at 10:50 AM
Alkalisches Gesteinsmehl soll die CO2-Aufnahme der Meere im Kampf gegen den #Klimawandel erhöhen. Wie Forschende vom @geomarkiel.bsky.social die Effizienz und ökologischen Folgen der #Ozeanalkalinisierung untersuchen, habe ich fürs Magazin Bild der Wissenschaft aufgeschrieben.