Alf Norkko
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alfnorkko.bsky.social
Alf Norkko
@alfnorkko.bsky.social
1.1K followers 370 following 15 posts

Marine ecologist. Prof at Tvärminne Zoological Station, University of Helsinki and at www.coastclim.org

Videos
Environmental science 55%
Geography 20%
Posts Replies Media Videos

Reposted by Anne Applebaum, Stephen M. Walt, Kori Schake , and 88 more

federalreserve.gov
Federal Reserve @federalreserve.gov · 1d
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
www.youtube.com

Reposted by Alf Norkko

drpauldorfman.bsky.social
Dr Paul Dorfman @drpauldorfman.bsky.social · 4d
‘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
www.theguardian.com

Reposted by Alf Norkko, Stephen D. Murphy

leonsimons.com
Leon Simons @leonsimons.com · Dec 2
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...

Reposted by Alf Norkko

Reposted by Alf Norkko, Camilla Gustafsson

coastclim.bsky.social
CoastClim @coastclim.bsky.social · Aug 15
🚨 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

Reposted by Lars Gamfeldt

alfnorkko.bsky.social
Alf Norkko @alfnorkko.bsky.social · Aug 11
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

Reposted by Alf Norkko

coastclim.bsky.social
CoastClim @coastclim.bsky.social · Feb 17
New 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.
Seasonal Variation in the Role of Benthic Macrofauna Communities for Ecosystem Functioning in Shallow Coastal Soft-Sediment Habitats - Estuaries and Coasts
Coastal zones include a variety of habitats and numerous biodiversity components, which provide essential ecosystem functions and services. In the wake of the escalating climate and biodiversity crise...
doi.org

Reposted by Alf Norkko

jussiteronen.bsky.social
Jussi T. Eronen @jussiteronen.bsky.social · Jul 5
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

alfnorkko.bsky.social
Alf Norkko @alfnorkko.bsky.social · Jun 16
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

Reposted by Alf Norkko

ostersjocentrum.bsky.social
Stockholms universitets Östersjöcentrum @ostersjocentrum.bsky.social · Jun 10
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…
www.hbl.fi

Reposted by Mikael Ehn

alfnorkko.bsky.social
Alf Norkko @alfnorkko.bsky.social · Jun 7
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…
www.hbl.fi

Reposted by Lars Gamfeldt, Camilla Gustafsson

alfnorkko.bsky.social
Alf Norkko @alfnorkko.bsky.social · May 18
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

Reposted by Alf Norkko, Lars Gamfeldt

cmgustafsson.bsky.social
Camilla Gustafsson @cmgustafsson.bsky.social · Apr 28
🚨 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

Reposted by Alf Norkko

earthsciinfo.bsky.social
Joseph D. Ortiz @earthsciinfo.bsky.social · Apr 28
My postdoc advisor, Wally Broecker, said: "Climate is an angry beast, and we are poking it with sticks." Well, we are getting to the FOFO stage. 🧪 www.esa.int/Applications...
Sea surface warming faster than expected
Satellite observations show that sea-surface temperatures over the past four decades have been getting warmer at an accelerated pace.
www.esa.int

alfnorkko.bsky.social
Alf Norkko @alfnorkko.bsky.social · Apr 18
Yes! It is marvellous 😀

Reposted by Alf Norkko

Reposted by Craig R. Primmer

alfnorkko.bsky.social
Alf Norkko @alfnorkko.bsky.social · Mar 28
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

Reposted by Alf Norkko

aquanorman.bsky.social
Norman @aquanorman.bsky.social · Mar 28
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

Reposted by Alf Norkko

Reposted by Alf Norkko

funecology.bsky.social
Functional Ecology @funecology.bsky.social · Mar 28
🌊Published🌊

Hot water, busy seafloor: How #marine #heatwaves amplify nutrient cycling

@alfnorkko.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

Reposted by Alf Norkko

coastclim.bsky.social
CoastClim @coastclim.bsky.social · Mar 25
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.

alfnorkko.bsky.social
Alf Norkko @alfnorkko.bsky.social · Mar 13
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.
www.bbc.com

Reposted by Alf Norkko

Reposted by Alf Norkko

Reposted by Alf Norkko

coastclim.bsky.social
CoastClim @coastclim.bsky.social · Mar 4
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

Reposted by Alf Norkko

Reposted by Alf Norkko

alfnorkko.bsky.social
Alf Norkko @alfnorkko.bsky.social · Feb 17
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.bsky.social CoastClim @coastclim.bsky.social · Feb 17
New 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.
Seasonal Variation in the Role of Benthic Macrofauna Communities for Ecosystem Functioning in Shallow Coastal Soft-Sediment Habitats - Estuaries and Coasts
Coastal zones include a variety of habitats and numerous biodiversity components, which provide essential ecosystem functions and services. In the wake of the escalating climate and biodiversity crise...
doi.org

alfnorkko.bsky.social
Alf Norkko @alfnorkko.bsky.social · Feb 13
Congratulations!! :-)