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Mark Hopwood

@markinchina

Scientist living in Shenzhen, China. Associate Professor in Marine Biogeochemistry at SUSTech, Associate Editor at JGR:Oceans. Father to a baby dragon. https://www.hopwood-marine-science.com/ He/him ๐ŸŒŠ ๐Ÿปโ€โ„๏ธ ๐Ÿง

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08.01.2024
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Latest posts by Mark Hopwood @markinchina

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Apply for a doctoral position at the SEAL polar research school Doctoral positions are now available at the national polar research school SEAL - School of Excellence in Arctic and Antarctic Learning. The research school is funded by the Swedish Research Council a...

Come to Sweden! We are kicking off the new Swedish research school in Polar Science this summer, and under that umbrella there are currently a number of PhD positions announced (more on the way). Read more, and apply, here:

www.gu.se/en/seal/appl...

Shares = eternal karma
๐ŸŒŠ

04.03.2026 07:39 ๐Ÿ‘ 11 ๐Ÿ” 11 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0
This lovely sea anemone is basking in a tidepool in the setting sun. It is pale green, with pink tentacle tips, and radiating lines extend from its manus across its oral disc.

This lovely sea anemone is basking in a tidepool in the setting sun. It is pale green, with pink tentacle tips, and radiating lines extend from its manus across its oral disc.

Sunset sunburst sea anemone. Check out the tentacle shadows across the oral discโ€ฆ ๐ŸŒ…๐ŸŒŠ๐ŸŒธ #MarineLife #Invertebrate #Anthopleura

03.03.2026 03:47 ๐Ÿ‘ 43 ๐Ÿ” 5 ๐Ÿ’ฌ 1 ๐Ÿ“Œ 1
Job description text

Job description text

Job description text

Job description text

Cruise logo from our 2024 expedition to Greenland

Cruise logo from our 2024 expedition to Greenland

Sampling on a small motorboat during our 2024 expedition to Greenland

Sampling on a small motorboat during our 2024 expedition to Greenland

If you're interested in particle fluxes, sinking plankton and the Arctic, then the fantastic Emilia Trudnowska has a great 2.5 year position open for you: Work on data from our Arctic expeditions to study how microbial dynamics around Greenland and Svalbard are responding to climate change ๐ŸŒŠ

03.03.2026 01:12 ๐Ÿ‘ 3 ๐Ÿ” 2 ๐Ÿ’ฌ 1 ๐Ÿ“Œ 0
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Dusting off the iron hypothesis - Nature Geoscience Erosion by the West Antarctic Ice Sheet can supply iron to the Southern Ocean, with iron solubility as important as iron quantity in shaping ocean productivity and carbon cycling. The future projectio...

www.nature.com/articles/s41...

www.nature.com/articles/s43...

02.03.2026 00:36 ๐Ÿ‘ 3 ๐Ÿ” 1 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0

Two new articles this week about how Fe from Antarctica fertilizes the Southern Ocean.

In NGeoscience Struve et al., suggest this process has been vastly under-estimated. In Comms E&E, Chinni et al., suggest this process has been vastly over-estimated.

Such is research ๐Ÿ˜…

02.03.2026 00:35 ๐Ÿ‘ 3 ๐Ÿ” 0 ๐Ÿ’ฌ 1 ๐Ÿ“Œ 0
Lecture room filled with students eating pizza

Lecture room filled with students eating pizza

Lecture room filled with students eating pizza

Lecture room filled with students eating pizza

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When I started at SUSTech nobody really knew what 'biogeochemistry' was, so we started giving lunchtime talks about our research topics. These are now so popular we have to ticket them ๐Ÿ˜…. I'm sure the free pizza helps motivate interest ๐Ÿ˜† ๐ŸŒŠ

28.02.2026 01:26 ๐Ÿ‘ 5 ๐Ÿ” 0 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0

Interesting. The devil is in the detail though; I use a similar concept in class to show how error propagation becomes an issue. Factoring in additionality, and changes to the CH4 & N2O budgets makes the uncertainty large. Spatial decoupling between C fixation and respiration is also a big problem..

22.02.2026 22:02 ๐Ÿ‘ 0 ๐Ÿ” 0 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0

When my wife visited the UK, she loved the scenery and culture but was shocked by the state of public transport, the amount of homelessness on city streets, and the fact that you can't instantly buy something online like in China ๐Ÿ˜…

"What do you mean we have to wait a week for delivery?!"

22.02.2026 02:00 ๐Ÿ‘ 1 ๐Ÿ” 0 ๐Ÿ’ฌ 1 ๐Ÿ“Œ 0

I used trains twice this week, the busiest of the year, via a station which handles >300,000 passengers a day. I asked a staff member for their punctuality. This year's data is pending, last Spring Festival 98.7% of trains ran on time... These numbers would embarrass most other rail services.

21.02.2026 10:03 ๐Ÿ‘ 0 ๐Ÿ” 0 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0
My wife and I are served drink after one of (too) many spring festival dinners this week.

My wife and I are served drink after one of (too) many spring festival dinners this week.

"You met me at a very Chinese time in my life"
#Chinamaxxing

21.02.2026 09:50 ๐Ÿ‘ 1 ๐Ÿ” 0 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0
Rapid Reviews with AGU Editors at OSM26
Thursday 26 Feb at 12:00-14:00 GMT in the Career Centre

Rapid Reviews with AGU Editors at OSM26 Thursday 26 Feb at 12:00-14:00 GMT in the Career Centre

๐ŸŒŠSign up to discuss your work with an AGU journal editor at #OSM26!

๐Ÿ“šIn a 15-minute session, get tailored advice on publishing and choosing the best journal for your research. Bring your abstract, poster, or elevator pitch and join us in the Career Center.

โžก๏ธ lite.spr.ly/6001PTtc

19.02.2026 15:02 ๐Ÿ‘ 5 ๐Ÿ” 4 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0
Locations with nutrient data around Greenland 1920-2020

Locations with nutrient data around Greenland 1920-2020

Nutrient data and key water mass endmembers for Greenland's coastal seas (1920-2020)

Nutrient data and key water mass endmembers for Greenland's coastal seas (1920-2020)

RV Sanna sailing in Disko Bay

RV Sanna sailing in Disko Bay

Icebergs in Disko Bay

Icebergs in Disko Bay

Xin noted that when probing ice-ocean interactions around #Greenland, we usually focus on 1 cruise or 1 region. He took the initiative to analyze all available data. Two years later, he presents a comprehensive synthesis of nutrients in time and space๐ŸŒŠ
agupubs.onlinelibrary.wiley.com/doi/10.1029/...

18.02.2026 06:33 ๐Ÿ‘ 6 ๐Ÿ” 2 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0
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It's a standing joke in China that the BBC always pains to find a negative angle on Chinese news.

For context, I've used public transport in China almost every day for 5 years and I've experienced a grand TOTAL of 2 hours delayed. Any comparison at all with British rail just would be embarrassing๐Ÿ˜…

18.02.2026 02:50 ๐Ÿ‘ 2 ๐Ÿ” 0 ๐Ÿ’ฌ 3 ๐Ÿ“Œ 0
Exploring Yunnan

Exploring Yunnan

Dapeng, an ancient fortress city and now tourism resort on the edge of Shenzhen

Dapeng, an ancient fortress city and now tourism resort on the edge of Shenzhen

Friends host my mum in Chengdu

Friends host my mum in Chengdu

Colleagues decided I must try every beer at their favorite restaurant (to quote Henry Kissinger, China's hospitality skills are far superior to those of the west)

Colleagues decided I must try every beer at their favorite restaurant (to quote Henry Kissinger, China's hospitality skills are far superior to those of the west)

"You caught me at a very Chinese time in my life" ๐Ÿ˜†

ๆ–ฐๅนดๅฟซไน! Happy Chinese New Year, wishing everyone good fortune in the year of the horse ๐Ÿงง๐Ÿฎ๐ŸŽ

18.02.2026 02:38 ๐Ÿ‘ 3 ๐Ÿ” 0 ๐Ÿ’ฌ 1 ๐Ÿ“Œ 0
Visiting the flower market for new year trinkets and decorations

Visiting the flower market for new year trinkets and decorations

Family meal out in Dapeng Fortress city

Family meal out in Dapeng Fortress city

Our little dragon

Our little dragon

Friends enjoying the Shenzhen winter sun

Friends enjoying the Shenzhen winter sun

Best wishes for the Spring festival. As our lab breaks for Chinese New Year my family are visiting to spend some time with our little dragon ๐Ÿงง๐Ÿฎ๐ŸŽ

07.02.2026 09:10 ๐Ÿ‘ 0 ๐Ÿ” 0 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0
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AGU is now accepting applications for Editors-in-Chief across five publications, with terms starting Jan 1, 2027. These roles help shape editorial standards, research quality, and peer review in Earth & space science. Apply by May 1, 2026.
buff.ly/8Mxy8vq

03.02.2026 13:33 ๐Ÿ‘ 5 ๐Ÿ” 5 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 2
Quote from the cruise log of Maria S Merian on science expedition MSM130

Quote from the cruise log of Maria S Merian on science expedition MSM130

In 2024, we encountered a perilous MAYDAY.

A small yacht sailed blind into dense ice with heavy fog and got stuck for 3 days. Drinking water froze, ice pressed the hull & polar bears were nearby. With 0 chance of rescue by helicopter or icebreaker, only a lucky change in weather saved 6 people.

31.01.2026 06:41 ๐Ÿ‘ 1 ๐Ÿ” 0 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0
Study@SJTU - Shanghai Jiao Tong University

In July, I will be teaching in Shanghai at SJTU for their UN Sustainable Development Goals summer school. 9 summer courses are available suitable for any interested students. I will co-teach "The marine carbon pump jigsaw: science, sustainability and management"

global.sjtu.edu.cn/en/study-sjt...

31.01.2026 05:32 ๐Ÿ‘ 1 ๐Ÿ” 1 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0
Polar Bears Trying to Eat Research Equipment in the Beaufort Sea
Polar Bears Trying to Eat Research Equipment in the Beaufort Sea YouTube video by Fukushima InFORM

Not all earthlings appreciate CTDโ€™s but the can be very curious about them. Here are a mother polar bear ๐Ÿปโ€โ„๏ธ with her two cubs inspecting our sea cable in the Canadian ๐Ÿ‡จ๐Ÿ‡ฆ Arctic Ocean back in 2015 youtu.be/JC2befsNa1Y The CTD is 2000 m down. The bears were not hurt and swam off shortly after ๐ŸŒŠ

22.01.2026 15:32 ๐Ÿ‘ 16 ๐Ÿ” 7 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 1

This is often suggested (& some grant agencies do ๐Ÿ˜†๐Ÿ‘). Yet the difficulty with society journals is reviewer fees would presumably get added to article charges... which already deter most scientists

e.g. JGR:Oceans in 2024 used 2967 reviews for 461 publications, $50 per review is +$320 to our fees

20.01.2026 01:28 ๐Ÿ‘ 1 ๐Ÿ” 0 ๐Ÿ’ฌ 1 ๐Ÿ“Œ 0

This is unfortunately normal... in the AGU system the average response time of scientists to reviews ranges from a few days to over 6 months... Editors are only as good as the community...

20.01.2026 00:24 ๐Ÿ‘ 0 ๐Ÿ” 0 ๐Ÿ’ฌ 1 ๐Ÿ“Œ 0
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Hundreds of Scientists โ€œVehemently Opposeโ€ U.S. Effort to Purchase Greenland - Eos About 350 scientists scientists have signed a letter condemning U.S. President Donald Trumpโ€™s efforts to acquire Greenland.

โ€œPresident Trumpโ€™s talk of โ€˜buyingโ€™ Greenland is not only an affront to Greenlandโ€™s autonomy but also a dangerous distraction from the urgent work of addressing environmental change impacts to US citizens,โ€ the letter reads. eos.org/research-and...

12.01.2026 21:01 ๐Ÿ‘ 22 ๐Ÿ” 11 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 1
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Greenland

10.01.2026 13:47 ๐Ÿ‘ 638 ๐Ÿ” 153 ๐Ÿ’ฌ 25 ๐Ÿ“Œ 12
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Very happy to welcome Dr Abby Guo to our group today as a postdoc. She will be using data from China's largest Ocean Alkalinity Enhancement trials to understand how well the concept works as a C sink and what the potential side-effects are on marine ecosystems ๐ŸŒŠ

www.hopwood-marine-science.com/about

13.01.2026 03:58 ๐Ÿ‘ 5 ๐Ÿ” 0 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0

I love how capable some of my students think I am. They will email me a huge draft, a thesis chapter, paper or long assignment, 2 to 5 minutes before we meet, then walk into my office and ask me what I thought about it and how it can be improved.

I can read quite fast, but not that fast.... ๐Ÿ˜…๐Ÿ˜…๐Ÿ˜…

13.01.2026 02:29 ๐Ÿ‘ 0 ๐Ÿ” 0 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0
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Greenlanders express fear and indignation as Trump eyes territory Greenlanders tell the BBC they have no interest in becoming American as the White House restates its desire for annexation.

#Greenland is a wonderful place. Its people are warm, open, welcoming and very observant about the natural environment of their home. They are not a colony to be bought, sold, occupied or invaded. They are an independent nation to be respected in the global community.

www.bbc.com/news/article...

08.01.2026 01:36 ๐Ÿ‘ 4 ๐Ÿ” 1 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0
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US discussing options to acquire Greenland, including use of military - White House It came as European allies rallied behind Denmark after renewed US insistence it must have Greenland.

Time to wake up and smell the coffee. The US is an aggressive military state with no respect for the rule of law.

What sort of country kidnaps foreign leaders and charges them with fabricated crimes, or threatens to invade their neighbors if they don't surrender land?

www.bbc.com/news/article...

07.01.2026 01:09 ๐Ÿ‘ 2 ๐Ÿ” 0 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0

I use a 20-minute rule... If I cannot access documents for review within 20 minutes of trying, I apologize that I will not be completing the review and kindly request the workflow is improved to save reviewer time (a rule developed after once spending over 2 hours to access a text for review ๐Ÿ˜…)

05.01.2026 07:57 ๐Ÿ‘ 1 ๐Ÿ” 0 ๐Ÿ’ฌ 1 ๐Ÿ“Œ 0
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Trump's Maduro raid could set precedent for authoritarian powers across globe Trump seems to believe he makes the rules and others cannot have the same privileges.

When the west bangs on about freedom and democracy, the east hears hypocrisy, double-standards and civil disasters in the making.

"America's record of achieving regime change by force in the last 30 years is disastrous."

www.bbc.com/news/article...

05.01.2026 00:37 ๐Ÿ‘ 2 ๐Ÿ” 0 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0
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My Christmas present this year. A painting of the RV Tangaroa in the Ross Sea Antarctica by Alfred Memelink memelink.nz. Anyone have nice paintings or artwork of research vessels in beautiful places? ๐ŸŒŠ๐Ÿšข please share.

25.12.2025 01:03 ๐Ÿ‘ 22 ๐Ÿ” 3 ๐Ÿ’ฌ 3 ๐Ÿ“Œ 0