A positive atmospheric feedback on the North Atlantic warming hole

Autor: Sydney M. Kramer, Kristopher B. Karnauskas, Lei Zhang, Ulla K. Heede, Heng Liu

Publikováno v: Scientific Reports, Vol 14, Iss 1, Pp 1-8 (2024)

Abstract A persistent cooling trend in the subpolar North Atlantic known as the North Atlantic Warming Hole (NAWH) has appeared in sea surface temperature (SST) observations since 1870, and the reasons for its persistence in an era of rapid anthropog

Externí odkaz: https://doaj.org/article/35f2724b766f4a1f900839df44598908

Colder Eastern Equatorial Pacific and Stronger Walker Circulation in the Early 21st Century: Separating the Forced Response to Global Warming From Natural Variability

Autor: Ulla K. Heede, Alexey V. Fedorov

Publikováno v: Geophysical Research Letters, Vol 50, Iss 3, Pp n/a-n/a (2023)

Abstract Since the early 1990s the Pacific Walker circulation shows a multi‐decadal strengthening, which contradicts future model projections. Whether this trend, evident in many climate indices especially before the 2015 El Niño, reflects the cou

Externí odkaz: https://doaj.org/article/974be192b5004188b71f0d037714be49

A stronger versus weaker Walker: understanding model differences in fast and slow tropical Pacific responses to global warming

Autor: Ulla K. Heede, Alexey V. Fedorov, Natalie J. Burls

Publikováno v: Climate Dynamics
Climate Dynamics, Springer Verlag, 2021, 57, pp.2505-2522. ⟨10.1007/s00382-021-05818-5⟩
Climate Dynamics, 2021, 57, pp.2505-2522. ⟨10.1007/s00382-021-05818-5⟩

International audience; The tropical Pacific response to radiative forcing remains uncertain as projected future changes to the Walker circulation and SST patterns vary substantially among climate models. Here, we study what sets the magnitude and ti

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0fb5c4db0188fffeb0607aa7bfec3c33
https://hal.archives-ouvertes.fr/hal-03279674/file/hee1.pdf

Time scales and mechanisms for the tropical Pacific response to global warming: a tug of war between the ocean thermostat and weaker Walker

Autor: Natalie J. Burls, Ulla K. Heede, Alexey V. Fedorov

Publikováno v: Journal of Climate
Journal of Climate, American Meteorological Society, 2020, 33 (14), pp.6101-6118. ⟨10.1175/jcli-d-19-0690.1⟩
Journal of Climate, 2020, 33 (14), pp.6101-6118. ⟨10.1175/jcli-d-19-0690.1⟩

Different oceanic and atmospheric mechanisms have been proposed to describe the response of the tropical Pacific to global warming, yet large uncertainties persist on their relative importance and potential interaction. Here, we use idealized experim

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b102b26c5205125b7c739ef032a3080f
https://hal.archives-ouvertes.fr/hal-03195811