Response of Atlantic Meridional Overturning circulation to variability in surface wind stress on different scales ...

• Main Authors: Markina, Margarita, Johnson, Helen, Marshall, David
• Format: Conference Object
• Language: unknown
• Published: GFZ German Research Centre for Geosciences 2023
• Subjects: Labrador Sea; North Atlantic
• Online Access: https://dx.doi.org/10.57757/iugg23-2069; https://gfzpublic.gfz-potsdam.de/pubman/item/item_5018765

<!--!introduction!--> The Atlantic Meridional Overturning Circulation (AMOC) trends on decadal time scales and larger are often masked by large interannual and seasonal variability. This variability and thus uncertainty in AMOC estimates on these scales comes from atmospheric synoptic eddies and mesoscale processes. In this study, we investigate AMOC sensitivity to synoptic and higher frequency variability in atmospheric winds. We performed the suite of sensitivity experiments with 1/12° regional configuration of MITgcm where we apply low-pass filtering to surface winds to extract variability lower than 2 days and 10 days thus capturing the impact of mesoscale variability and atmospheric cyclones respectively on the circulation in the subpolar North Atlantic. Larger magnitude of the surface winds primarily has local effects on the ocean state enhancing ocean heat loss, decreasing upper ocean temperatures, strengthening subpolar gyre, deepening the mixed layer in the Labrador Sea, and increasing the ... : The 28th IUGG General Assembly (IUGG2023) (Berlin 2023) ...