Reply on RC3

Published: March 12, 2024

Abstract. Abrupt changes in ocean biogeochemical variables occur as a result of human-induced climate forcing well those which are more gradual and over longer timescales. These abrupt have not yet been identified quantified to the same extent ones. We review synthesise biogeochemistry under climatic forcing. specifically address carbon oxygen cycles because related processes acidification deoxygenation provide important ecosystem hazards. Since depend also on physical environment, we describe relevant warming, circulation, sea ice. include an overview reversibility or irreversibility marine changes. Important implications for ecosystems discussed. conclude that there is evidence increasing occurrence consequence rising greenhouse gas emissions.

Language: Английский

---

Reply on RC2

Published: March 12, 2024

Abstract. Abrupt changes in ocean biogeochemical variables occur as a result of human-induced climate forcing well those which are more gradual and over longer timescales. These abrupt have not yet been identified quantified to the same extent ones. We review synthesise biogeochemistry under climatic forcing. specifically address carbon oxygen cycles because related processes acidification deoxygenation provide important ecosystem hazards. Since depend also on physical environment, we describe relevant warming, circulation, sea ice. include an overview reversibility or irreversibility marine changes. Important implications for ecosystems discussed. conclude that there is evidence increasing occurrence consequence rising greenhouse gas emissions.

Language: Английский

---

Climate Change and terrigenous inputs decrease the efficiency of the future Arctic Ocean’s biological carbon pump

Research Square (Research Square), Journal Year: 2024, Volume and Issue: unknown

Published: Feb. 21, 2024

Abstract The Arctic experiences climate changes that are among the fastest in world and affect all Earth system components. Despite expected increase terrigenous inputs to Ocean, their impacts on biogeochemical cycles currently largely neglected IPCC-like models. We used a state-of-the-art high-resolution ocean biogeochemistry model, includes carbon nutrient from rivers coastal erosion, produce twenty-first-century pan-Arctic projections. Surprisingly, even with an anticipated rise primary production across wide range of emission scenarios, our findings indicate change leads counterintuitive 40% reduction efficiency Arctic's biological pump by 2100, which contribute 10%. Terrigenous will also drive intense CO 2 outgassing, reducing Ocean's sink at least 10% (33 TgC yr -1 ). These unexpected positive feedbacks, mostly due accelerated remineralization rates, lower Ocean’s capacity for sequestering carbon.

Language: Английский

---

Comment on egusphere-2022-1280

Published: Jan. 17, 2023

The Chukchi Slope Current is a westward-flowing current along the slope, which carries Pacific-origin water from shelf into Canada Basin and helps set regional hydrographic structure ecosystem. Using of experiments with an idealized primitive equation numerical model, we investigate energetics slope during ice-covered period. Numerical calculations show that growth surface eddies suppressed by ice friction, while perturbations at mid-depths can grow eddies, consistent linear instability analysis. However, because stress spatially variable, it able to drive Ekman pumping decrease available potential energy (APE) kinetic both mean flow mesoscale over vertical scale 100 m, well outside frictional layer. rate APE changes determined buoyancy flux, negative as ice-induced advects lighter (denser) upward (downward). A scaling analysis shows will dominate release for large flows, but effect baroclinic also important when horizontal deformation radius eddy velocity comparable velocity. Our results highlight importance friction in this may be relevant other regions.

Language: Английский

---

Comment on egusphere-2022-1280

Published: Jan. 17, 2023

Abstract. The Chukchi Slope Current is a westward-flowing current along the slope, which carries Pacific-origin water from shelf into Canada Basin and helps set regional hydrographic structure ecosystem. Using of experiments with an idealized primitive equation numerical model, we investigate energetics slope during ice-covered period. Numerical calculations show that growth surface eddies suppressed by ice friction, while perturbations at mid-depths can grow eddies, consistent linear instability analysis. However, because stress spatially variable, it able to drive Ekman pumping decrease available potential energy (APE) kinetic both mean flow mesoscale over vertical scale 100 m, well outside frictional layer. rate APE changes determined buoyancy flux, negative as ice-induced advects lighter (denser) upward (downward). A scaling analysis shows will dominate release for large flows, but effect baroclinic also important when horizontal deformation radius eddy velocity comparable velocity. Our results highlight importance friction in this may be relevant other regions.

Language: Английский

---