The future of Arctic sea-ice biogeochemistry and ice-associated ecosystems

Lannuzel, Delphine; Tedesco, Letizia; Leeuwe, Maria A. van; Campbell, Karley; Flores, Hauke; Delille, Bruno; Miller, Lisa A.; Stefels, Jacqueline; Assmy, Philipp; Bowman, Jeff S.; Brown, Kristina A.; Castellani, Giulia; Chierici, Melissa; Crabeck, Odile; Damm, Ellen; Else, Brent; Fransson, Agneta; Fripiat, François; Geilfus, Nicolas-Xavier; Jacques, Caroline; Jones, Elizabeth M.; Kaartokallio, Hermanni; Kotovitch, Marie; Meiners, Klaus M.; Moreau, Sébastien; Nomura, Daïki; Peeken, Ilka; Rintala, Janne-Markus; Steiner, Nadja; Tison, Jean-Louis; Vancoppenolle, Martin; Linden, Fanny Van der; Vichi, Marcello; Wongpan, Pat

doi:10.1038/s41558-020-00940-4

Cited by 149 publications

(128 citation statements)

References 107 publications

Supporting

Mentioning

128

Contrasting

Order By: Relevance

“…For all three locations, a transition was observed in the temperature profiles, with strong gradients from -2 C at the ice-seawater interface to much lower values at the surface (down to -20 C) at the beginning of the sampling period to nearly isothermal profiles at the end. Coinciding with the change in temperature was a decrease in sea-ice bulk salinities (Carnat et al, 2014;Fripiat et al, 2015;Lim et al, 2019;Van der Linden et al, 2020).…”

Section: Physical Parametersmentioning

confidence: 99%

“…The seasonal increase in biomass at the bottom of sea ice agrees with the evolution in dissolved inorganic carbon (DIC) and molecular oxygen (O 2 ) at YROSIAE (Figure S4). It is indicative of a net autotrophic system with consumption of DIC and production of O 2 during the growth season (September-November) and a net heterotrophic system with production of DIC and consumption of O 2 in late spring (Van der Linden et al, 2020).…”

Section: Biogeochemical Dynamics In Antarctic Bottom Landfast Icementioning

confidence: 99%

See 1 more Smart Citation

The biogeochemical role of a microbial biofilm in sea ice

et al. 2021

Self Cite

View full text Add to dashboard Cite

A paradox is commonly observed in productive sea ice in which an accumulation in the macro-nutrients nitrate and phosphate coincides with an accumulation of autotrophic biomass. This paradox requires a new conceptual understanding of the biogeochemical processes operating in sea ice. In this study, we investigate this paradox using three time series in Antarctic landfast sea ice, in which massive algal blooms are reported (with particulate organic carbon concentrations up to 2,600 µmol L–1) and bulk nutrient concentrations exceed seawater values up to 3 times for nitrate and up to 19 times for phosphate. High-resolution sampling of the bottom 10 cm of the cores shows that high biomass concentrations coexist with high concentrations of nutrients at the subcentimeter scale. Applying a nutrient-phytoplankton-zooplankton-detritus model approach to this sea-ice system, we propose the presence of a microbial biofilm as a working hypothesis to resolve this paradox. By creating microenvironments with distinct biogeochemical dynamics, as well as favoring nutrient adsorption onto embedded decaying organic matter, a biofilm allows the accumulation of remineralization products (nutrients) in proximity to the sympagic (ice-associated) community. In addition to modifying the intrinsic physicochemical properties of the sea ice and providing a substrate for sympagic community attachment, the biofilm is suggested to play a key role in the flux of matter and energy in this environment.

show abstract

Section: Physical Parametersmentioning

confidence: 99%

Section: Biogeochemical Dynamics In Antarctic Bottom Landfast Icementioning

confidence: 99%

The biogeochemical role of a microbial biofilm in sea ice

et al. 2021

Self Cite

View full text Add to dashboard Cite

show abstract

“…Increases in the area of open water due to reduced Arctic sea ice have changed the heat flux exchange, water vapor flux, momentum, and solar radiation between the ocean and atmosphere (Howell et al, 2018;Boutin et al, 2020). The increase in freshwater caused by the melting of sea ice affects the deep waters of the North Atlantic and plays an important role in global thermohaline circulation, thus affecting the global climate (Bader et al, 2011;Lannuzel et al, 2020).…”

Section: )mentioning

confidence: 99%

Multiscale Variations in Arctic Sea Ice Motion, Links to Atmospheric and Oceanic Conditions

Fu¹,

Liu²,

Qi³

et al. 2021

Preprint

View full text Add to dashboard Cite

Abstract. Arctic sea ice drift motion affects the global material balance, energy exchange and climate change and seriously affects the navigation safety of ships along certain channels. Due to the Arctic's special geographical location and harsh natural conditions, observations and broad understanding of the Arctic sea ice motion of sea ice are very limited. In this study, sea ice motion data released by the National Snow and Ice Data Center (NSIDC) were used to analyze the climatological, spatial and temporal characteristics of the Arctic sea ice drift from 1979 to 2018 and to understand the multiscale variation characteristics of the three major Arctic sea ice drift patterns. The results show that the sea ice drift velocity is greater in winter than in summer. The empirical orthogonal function (EOF) analysis method was used to extract the three main sea ice drift patterns, which are the anticyclonic sea ice drift circulation pattern on the scale of the Arctic basin, the average sea ice transport pattern from the Arctic Ocean to the Fram Strait and the transport pattern moving ice between the Kara Sea (KS) and the northern coast of Alaska. By using the ensemble empirical mode decomposition (EEMD) method, each temporal coefficient series extracted by the EOF method was decomposed into multiple time-scale sequences. We found that the three major drift patterns have 4 significant interannual variation periods of approximately 1, 2, 4 and 8 years. Furthermore, the second pattern has a significant interdecadal variation characteristic with a period of approximately 19 years, while the other two patterns have no significant interdecadal variation characteristics. Combined with the atmospheric and oceanic physical environmental data, the results of the correlation analysis show that the first EOF sea ice drift pattern is mainly affected by atmospheric environmental factors, the second pattern is affected by the joint action of atmospheric and oceanic factors, and the third pattern is mainly affected by oceanic factors. Our study suggests that the ocean environment also has a significant influence on sea ice movement. Especially for some sea ice transport patterns, the influence even exceeds atmospheric forcing.

show abstract

“…Arctic coasts are one of the fastest changing systems due to climate change. Thus, modeling their dynamics is difficult but crucial for predictions of primary production with climate change (e.g., Slagstad et al, 2015;Fritz et al, 2017;Lannuzel et al, T. R. Vonnahme et al: Modeling silicate-nitrate-ammonium co-limitation of algal growth 2020). In Arctic coastal ecosystems, primary production is typically highest in spring.…”

Section: Introductionmentioning

confidence: 99%

“…In some Arctic systems urea excreted by zooplankton may be an important N source for regenerated algae production (Conover and Gustavson, 1999). A warmer climate will increase both bacteria-related remineralization rates (Legendre and Rassoulzadegan, 1995;Lannuzel et al, 2020) and abiotic silica dissolution (Bidle and Azam, 1999). However, the magnitude is not well understood.…”

Section: Introductionmentioning

confidence: 99%

Modeling silicate–nitrate–ammonium co-limitation of algal growth and the importance of bacterial remineralization based on an experimental Arctic coastal spring bloom culture study

et al. 2021

View full text Add to dashboard Cite

Abstract. Arctic coastal ecosystems are rapidly changing due to climate warming. This makes modeling their productivity crucially important to better understand future changes. System primary production in these systems is highest during the pronounced spring bloom, typically dominated by diatoms. Eventually the spring blooms terminate due to silicon or nitrogen limitation. Bacteria can play an important role for extending bloom duration and total CO2 fixation through ammonium regeneration. Current ecosystem models often simplify the effects of nutrient co-limitations on algal physiology and cellular ratios and simplify nutrient regeneration. These simplifications may lead to underestimations of primary production. Detailed biochemistry- and cell-based models can represent these dynamics but are difficult to tune in the environment. We performed a cultivation experiment that showed typical spring bloom dynamics, such as extended algal growth via bacterial ammonium remineralization, reduced algal growth and inhibited chlorophyll synthesis under silicate limitation, and gradually reduced nitrogen assimilation and chlorophyll synthesis under nitrogen limitation. We developed a simplified dynamic model to represent these processes. Overall, model complexity in terms of the number of parameters is comparable to the phytoplankton growth and nutrient biogeochemistry formulations in common ecosystem models used in the Arctic while improving the representation of nutrient-co-limitation-related processes. Such model enhancements that now incorporate increased nutrient inputs and higher mineralization rates in a warmer climate will improve future predictions in this vulnerable system.

show abstract

The future of Arctic sea-ice biogeochemistry and ice-associated ecosystems

Cited by 149 publications

References 107 publications

The biogeochemical role of a microbial biofilm in sea ice

The biogeochemical role of a microbial biofilm in sea ice

Multiscale Variations in Arctic Sea Ice Motion, Links to Atmospheric and Oceanic Conditions

Modeling silicate–nitrate–ammonium co-limitation of algal growth and the importance of bacterial remineralization based on an experimental Arctic coastal spring bloom culture study

Contact Info

Product

Resources

About