Alf Norkko
@alfnorkko.bsky.social
Marine ecologist. Prof at Tvärminne Zoological Station, University of Helsinki and at www.coastclim.org
🚨New paper by N-X Geilfus et al. report on spatial heterogeneity of GHG dynamics in the shallow coastal zone. 👉Check out the interesting results from the extensive real-world measurements: doi.org/10.5194/bg-2... @alfnorkko.bsky.social @tvarminne.bsky.social @helsinki.fi @finmari-ri.bsky.social
‘Profound impacts’: record ocean heat is intensifying #climate disasters, data shows Oceans absorb 90% of global heating, making them a stark indicator of the relentless march of the climate crisis www.theguardian.com/environment/...
‘Profound impacts’: record ocean heat is intensifying climate disasters, data shows
Oceans absorb 90% of global heating, making them a stark indicator of the relentless march of the climate crisis
theguardian.com
Video message from Federal Reserve Chair Jerome H. Powell: www.youtube.com/watch?v=KckG... www.federalreserve.gov/newsevents/s...
Statement by Federal Reserve Chair Jerome H. Powell
YouTube video by Federal Reserve
youtube.com
The additional greenhouse gases in the atmosphere now cause about 33 Hiroshima bombs per second of additional heat to be radiated back down to Earth. The Earth's Energy Imbalance is now ~10 Hiroshimas per second. But who's counting. bsky.app/profile/leon...
Leon Simons@leonsimons.com · 9mo agoThe total greenhouse gas forcing is now 4.1 W/m² (according to IPCC methodology), which equals about 33.2 Hiroshima bombs per second. Aerosols cause cooling and lower the net forcing. And a hotter Earth (about +1.5°C the past year) radiates more heat to space, as the above NASA CERES data shows.
🚨 New publication!! 🚨 Read the review paper by Lydia White & @alfnorkko.bsky.social, on how to experimentally assess carbon sequestration potential of macroalgae. doi.org/10.1111/1365...
A path towards appropriate degradation experiments for assessing carbon sequestration potential of macroalgae
We systematically reviewed literature on macroalgal degradation. To date, most degradation experiments are carried out in aquaria or shallow environments, span short timescales or rarely incorporate ...
doi.org
This review clearly shows that macroalgal decomposition rates vary significantly between experimental approaches and are severely underestimated when a refractory pool is not considered, impacting scaled-up estimates of macroalgal carbon export to the deep ocean 🌊🌱
Alf Norkko@alfnorkko.bsky.social · last yr.Check out our new review paper, championed by Lydia White, "A path towards appropriate degradation experiments for assessing carbon sequestration potential of macroalgae". Read it here: besjournals.onlinelibrary.wiley.com/doi/10.1111/... @coastclim.bsky.social @tvarminne.bsky.social #mCDR
Check out our new review paper, championed by Lydia White, "A path towards appropriate degradation experiments for assessing carbon sequestration potential of macroalgae". Read it here: besjournals.onlinelibrary.wiley.com/doi/10.1111/... @coastclim.bsky.social @tvarminne.bsky.social #mCDR
A path towards appropriate degradation experiments for assessing carbon sequestration potential of macroalgae
We systematically reviewed literature on macroalgal degradation. To date, most degradation experiments are carried out in aquaria or shallow environments, span short timescales or rarely incorporate ....
besjournals.onlinelibrary.wiley.com
Southern Ocean circulation reversal may have already happened. This is a surprise and scary stuff. theconversation.com/completely-u...
‘Completely unexpected’: Antarctic sea ice may be in terminal decline due to rising Southern Ocean salinity
Scientists once thought Antarctica might hold onto its sea ice as the world warmed. No longer.
theconversation.com
New paper championed by Rebecca Gladstone-Gallagher et al for kids (with kids as reviewers) on the importance of connecting across ecosystems and human values @tvarminne.bsky.social @helsinki.fi @aucklanduni.bsky.social @coastclim.bsky.social kids.frontiersin.org/articles/10....
Water Flows Downhill: How Looking “Upstream” Can Help Maintain A Healthy Sea
Our planet is in trouble. We are losing plants, animals, and habitats, and the processes that link them are changing. Nature is becoming sick. People have been trying to fix this problem, but the situ...
kids.frontiersin.org
Ekologisk hållbarhet är en förutsättning för både ekonomiska och sociala värden – och måste sättas främst också i det kortsiktiga beslutsfattandet. Läs uppmaningen från @alfnorkko.bsky.social & Christoph Humborg @coastclim.bsky.social i @hbl.fi, med anledning av den pågående havskonferensen.
DEBATT: Finland och Sverige måste sätta ett friskt hav främst
Ekologisk hållbarhet är en förutsättning för ekonomiska och sociala värden i haven, skriver Alf Norkko och Christoph…
hbl.fi
Det är dags för Finland och Sverige att ta FNs havskonferens på allvar! @tvarminne.bsky.social @ostersjocentrum.bsky.social @coastclim.bsky.social @balticseacentre.bsky.social @helsinki.fi www.hbl.fi/2025-06-07/f...
DEBATT: Finland och Sverige måste sätta ett friskt hav främst
Ekologisk hållbarhet är en förutsättning för ekonomiska och sociala värden i haven, skriver Alf Norkko och Christoph…
hbl.fi
New paper: Marine biodiversity is declining across Finnish coastal waters, with loss driven by eutrophication, climate change & seabed disturbance. Urgent action, better monitoring & bridging knowledge gaps are key to ecosystem recovery. #Biodiversity #BalticSea link.springer.com/article/10.1...
Marine biodiversity loss in Finnish coastal waters: Evidence and implications for management - Ambio
Marine biodiversity loss poses significant ecological and socio-economic challenges. This paper examines how coastal biodiversity loss is expressed and outlines implications for management. Synthesizi...
link.springer.com
🚨 NEW paper alert! #Seagrass #functional #traits act as predictors of #biomass, albeit moderately. Study conducted across 1500 km coastline. Main #biodiversity mechanism driving seagrass #biomass stock is through dominance. @tvarminne.bsky.social @uwaoceans.bsky.social doi.org/10.1111/1365...
Functional traits are moderate predictors of above‐ and below‐ground biomass in multispecies seagrass habitats
Read the free Plain Language Summary for this article on the Journal blog.
doi.org
Check out our new paper on experimental manipulations in situ of #marine #heatwaves championed by @aquanorman.bsky.social & Laura Kauppi @joannanorkko.bsky.social @coastclim.bsky.social @tvarminne.bsky.social @helsinki.fi
Functional Ecology@funecology.bsky.social · last yr.🌊Published🌊 Hot water, busy seafloor: How #marine #heatwaves amplify nutrient cycling @alfnorkko.bsky.social 🌎🧪
Also check out our summary blog: “Hot Water, Busy Seafloor: How Marine Heatwaves Amplify Nutrient Cycling” fesummaries.wordpress.com/2025/03/07/h... Laura Kauppi, @alfnorkko.bsky.social, @joannanorkko.bsky.social, Nottbeck Foundation, Roth Finland Oy, @coastclim.bsky.social, @tvarminne.bsky.social
Hot Water, Busy Seafloor: How Marine Heatwaves Amplify Nutrient Cycling
Norman Göbeler, Laura Kauppi, Alf Norkko, Joanna Norkko. This is a plain language summary of a Functional Ecology article which can be found here. Marine heatwaves—periods of abnormally high water …
fesummaries.wordpress.com
Are the Oceans Reaching Their Limit? Join the Discussion at #ACCCImpactWeek on April 22. Top researchers from CoastClim participate @alfnorkko.bsky.social and Anna Villnäs. Register by April 9, the event is free of charge.
Check out this BBC story, covering our first Polar scientific diving course run by Edd Stockdale at the Finnish Scientific Diving Academy in 2024, building capacity for collecting data to understand rapid changes in polar regions. @tvarminne.bsky.social @helsinki.fi www.bbc.com/future/artic...
'You look up and see light coming through': The divers venturing under the ice in the name of science
It is a world cut off from our own by thick blankets of floating ice, but some scientists are taking the plunge to learn how these frozen depths are changing.
bbc.com
Read a news article written by our New Zealand collaborator Prof. Simon Thrush. He writes about the importance of the findings from the joint CoastClim- @aucklanduni.bsky.social field campaign that was conducted earlier this year.
NZ hopes to store carbon in marine ecosystems – but some are so degraded they’re already a source of emissions
Seagrass meadows, mangroves and kelp forests are carbon sinks. Restoring or protecting them addresses both biodiversity loss and the climate crisis.
theconversation.com
How often do we explore temporal context dependece in ecological pattern and process? Not nearly enough! Coastal ecosystem functions depend on biodiversity—but temporal context shapes how benthic species influence solute fluxes, with effects varying by season, species & site. Timing is key!
CoastClim@coastclim.bsky.social · 2y agoNew publication! Gammal et al. sampled benthic macrofauna, solute fluxes and environmental variables at 3 shallow habitats throughout one year. Results show that the strength of biodiversity-function relationships really depends on which species are present in which habitat and during which season.
Finally in my hands! Graduated with distinction!🎓🌊🎉 Huge thanks to @dansmale1.bsky.social for an engaging defense discussion, my supervisors J. Norkko and @alfnorkko.bsky.social, and colleagues and supporters NottbeckFdn @coastclim.bsky.social RothFinland. Link to thesis: hdl.handle.net/10138/587464
Looking for a PhD student to join us - focusing on quantifying GHG across coastal seascapes. Please help spread the word!
CoastClim@coastclim.bsky.social · 2y ago👉Open PhD position! in pelagic biogeochemistry @tvarminne.bsky.social @helsinkiuni.bsky.social Interested in investigating temporal and spatial variability in coastal sea-air GHG fluxes, impacts of heatwaves and links to biodiversity? Check this out! Apply before 31 January 👉coastclim.org/news
📢 3-year Postdoc Opportunity ❗❗ #FoodWebs I am seeking a postdoc to reconstruct energy fluxes in food webs using gut DNA and eDNA in mesocosms under heatwave scenarios @tvarminne.bsky.social @coastclim.bsky.social 📅 31. of Jan. 2025 ➡️ jobs.helsinki.fi/job/Hanko-3-... Please share post ❗❗
Oooh. This looks very interesting and cool site... (ping @alfnorkko.bsky.social )
David Ho@davidho.bsky.social · 2y agoYou want to know about this site that lets you explore data collected by the HMS Challenger from 1872–1876, an expedition that laid the foundation of oceanography. 🌊 challenger-expeditio...
Amazing to visit @tvarminne.bsky.social to act as opponent for a PhD defence by student of @alfnorkko.bsky.social and @joannanorkko.bsky.social - what a wonderful, historical marine station with some incredible science happening. Its proper Baltic ‘ere 🥶🌊❄️
Check out our latest CoastClim newsletter!
CoastClim@coastclim.bsky.social · 2y ago👉Read the latest Newsletter! After years of extensive field work and experiments, we are looking forward to combining data and discover new insights during the coming year! Find all letters and sign up here: coastclim.org/news
Our PhD student, Norman Göbeler, working on marine heatwaves defends his thesis tomorrow with Dan Smale as external examiner. The public examination can be followed online👇
Tvärminne Zoological Station@tvarminne.bsky.social · 2y agoNEW PhD thesis! Norman Göbeler will defend the doctoral dissertation entitled "The role of Marine Heatwaves for #biodiversity and #ecosystem functioning in #coastal waters" on Wednesday 4.12.2024 at 13PM. The public examination streamed here: helsinki.zoom.us/j/64509869274 #wearehelsinkiuni #tzs
Feeling inspired at the biannual CoastClim meeting in Stockholm, Sweden. So much good science coming out from this Swedish-Finnish consortium! With @alfnorkko.bsky.social, @cmgustafsson.bsky.social, etc.
New paper by Charlotte Angove as lead showing that #infauna can shift plant trait-productivity relationships in #SAV @alfnorkko.bsky.social onlinelibrary.wiley.com/doi/10.1002/...
Root puppet masters: Infauna shift trait‐productivity relationships in submerged aquatic vegetation communities
While co-restoration of seagrass and infauna is a viable solution to increase submerged aquatic vegetation (SAV) restoration success, more research is needed to understand how infauna affects the dri....
onlinelibrary.wiley.com
At beautiful #Askö laboratory @balticseacentre for a kick-off of a new transdisciplinary @coastclim research school at @Stockholm_Uni. Excitement in the air when more than a dozen new PhD students start their journey!
