Many existing hydrographic datasets have poor representation of the near-surface layer

The gap

Evidence profile

Sourced from the abstract and stated challenges and stated research gap of the source papers, classified as general, drawn from work published between 2017 and 2026, spanning 5 journals. Those papers have been cited 207 times in total.

Supporting evidence — 6 representative gaps

• Using ocean models to predict spatial and temporal variation in marine carbon isotopes (2017) · Ecosphere · cited 193× · doi

  Model predictions represent an initial hypothesis of spatial and temporal variation in carbon isotopic baselines in ocean areas where a few data are currently available, and provide the best currently available tool to estimate spatial and temporal variation in baseline isotopic compositions at ocean basin to global scales.

  generalabstractevidence 5/5
  Keywords: spatial temporal variation isotopic ocean currently available model predictions represent initial hypothesis carbon baselines areas
• Invasive Spartina alterniflora alters sediment organic carbon mineralization dynamics in a coastal wetland of Southeastern China (2024) · Frontiers in Marine Science · cited 9× · doi

  The study faces challenges in measuring sediment organic carbon fractions and mineralization dynamics. The study has to account for the variability in sediment geochemical properties and biogenic element contents. The study needs to consider the effects of seasonal variations on sediment organic carbon mineralization dynamics.

  generalstated challengesevidence 5/5
  Keywords: study faces challenges measuring sediment organic carbon fractions
• Estimates of carbon sequestration potential in an expanding Arctic fjord (Hornsund, Svalbard) affected by dark plumes of glacial meltwater (2024) · Biogeosciences · cited 5× · doi

  Since carbon burial was the least affected by iSPM (a decrease of around 16 %, in comparison to 50 % for plankton primary and secondary production), the impact of marine ice loss and enhanced land–ocean connectivity should be investigated further in the context of carbon fluxes in expanding polar fjords.

  generalabstractevidence 5/5
  Keywords: carbon burial least affected ispm decrease around comparison plankton primary secondary production impact marine loss
• Spatial heterogeneity of sedimentary organic carbon in fjords around Stavanger, Norway – implications for upscaling (2026) · Biogeosciences · doi

  Such quantitative estimates, while important for understanding the role of fjords in the global carbon cycle, often rest on data compilations that might not be representative for fjord environments as a whole due to unaccounted spatial heterogeneity in terms of substrate types, depositional environments and characteristics of sedimentary organic carbon.

  generalabstractevidence 5/5
  Keywords: carbon environments quantitative estimates important understanding role fjords global cycle often rest compilations representative fjord
• Pan‐Arctic Peatlands Have Expanded During Recent Warming (2026) · Global Change Biology · doi

  Expansion and/or shrinkage of Arctic peatlands under climate change also remain unknown due to lack of ground data and difficulties detecting changes in the extent of these ecosystems, meaning that land surface model predictions currently inadequately quantify Arctic terrestrial carbon storage changes.

  generalabstractevidence 5/5
  Keywords: arctic changes expansion shrinkage peatlands climate change remain unknown lack ground difficulties detecting extent ecosystems
• Hydrographic CTD profiles capturing the onset of near-surface stratification in Southwest Greenland fjords during two consecutive spring 2025 field campaigns (2026) · Earth system science data · doi

  Many existing hydrographic datasets have poor representation of the near-surface layer - In situ hydrographic observations in Greenland fjords remain sparse, particularly during late winter and early spring - Existing datasets often exhibit uneven spatial and temporal coverage

  generalstated research gapevidence 5/5
  Keywords: many existing hydrographic datasets have poor representation near-surface

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