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This study investigates how variations in Arctic sea ice and sea surfaceconditions influence δ18O of present-day Arctic precipitation. Thisis done using the model isoCAM3, an isotope-equipped version of the NationalCenter for Atmospheric Research Community Atmosphere Model version 3. Foursensitivity experiments and one control simulation are performed withprescribed sea surface temperature (SST) and sea ice. Each of the fourexperiments simulates the atmospheric and isotopic response to Arctic oceanicconditions for selected years after the beginning of the satellite era in1979. Changes in sea ice extent and SSTs have different impacts in Greenland andthe rest of the Arctic. The simulated changes in central Arctic sea ice do notinfluence δ18O of Greenland precipitation, only anomalies of Baffin Bay sea ice. However, this does notexclude the fact that simulations based on other sea ice and sea surfacetemperature distributions might yield changes in the δ18O ofprecipitation in Greenland. For the Arctic, δ18O of precipitationand water vapour is sensitive to local changes in sea ice and sea surfacetemperature and the changes in water vapour are surface based. Reduced seaice extent yields more enriched isotope values, whereas increased sea iceextent yields more depleted isotope values. The distribution of the sea iceand sea surface conditions is found to be essential for the spatialdistribution of the simulated changes in δ18O.</p

How does sea ice influence &lt;i&gt;δ&lt;/i&gt;&lt;sup&gt;18&lt;/sup&gt;O of Arctic precipitation?

How does sea ice influence <i>δ</i><sup>18</sup>O of Arctic precipitation?