Here are some non-CHESS activities which are highly relevant to some CHESS students:
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October 6, 2022 12:00-13:00
Title: Deciphering the water cycle of Arctic weather systems from airborne measurements
Speaker: Harald Sodemann, University of Bergen
October 10, 2022 11:00-12:00
Title: Arctic amplification: Process drivers and sources of uncertainty
Speaker: Patrick Taylor, NASA
October 17, 2022 12:00-13:00
Title: S-RIP, clouds, and radiation – focussing on the monsoon in the Upper Troposphere Lower Stratosphere
Speaker: Jonathon Wright, Tsinghua University
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This bi-weekly seminar, organized jointly by the University of Oslo, the Meteorological Institute, CICERO and NILU, invites renowned international experts to contribute to an informal series of lectures, meant to create interaction with the Oslo atmospheric and climate science community on recent highlights and analysis in the field. All seminars will be held on Thursdays.
If you are interested to join the meetings and get regular information about the seminar, follow this link to subscribe to the mailing list
https://sympa.uio.no/geo.uio.no/info/jos-seminar
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BCCR Monday seminar:
October 3, 2022 14:15
BCCR cross-theme seminar on “Science based on NorESM”.
The cross-theme seminar will feature four separate talks:
• Jöran Marz: Marine aggregates and the extended nitrogen cycle – new developments in NorESM
• Aleksi Nummelin: Recent developments and new possibilities for science with NorESM
• Harikrishnan Ramesh: Ocean resolution effects on the atmospheric circulation
• Konstanze Haubner: incorporating ice sheets in climate models
October 5, 2022 15:00
Title: On the significance of the baroclinic nature of the NAO and maritime blocking in winter
Speaker: Hisashi Nakamura
Abstract:
Atmospheric blocking events are often described as quasi-stationary barotropic circulation systems and studied from that viewpoint, because of their apparent lack of vertical tilt. This work demonstrates, however, that blocking events even over maritime regions often have a structure in which anomalies in geopotential height and temperature are horizontally out-of-phase, allowing blocking events to produce fluxes of heat against the climatological gradients for amplifying and maintaining blocking-related temperature anomalies. This process, which represents the baroclinic conversion of energy from the climatological-mean flow to blocking-related anomalies, is shown to be one of the leading energy sources. In winter, the contribution of the baroclinic energy conversion, especially for blocking anomalies over North Pacific and Greenland characterized by their vertically tilting structure in the lower troposphere, is substantially larger than the contributions from barotropic energy conversion from the westerlies and the feedback forcing by high-frequency eddies. Likewise, pressure anomalies associated with the dominant North Atlantic Oscillation (NAO) also exhibit vertically tilting structure in the lower troposphere with highly efficient in converting available potential energy associated with the eddy-driven westerly jet for their maintenance. This work thus sheds light on the importance of baroclinic processes for the NAO and maritime blocking events.
About the speaker:
Hisashi Nakamura is a professor of Research Center of Advanced Science and Technology (RCAST), the University of Tokyo. After receiving Ph.D. in atmospheric science from the University of Washington and then staying in Seattle and Princeton as a postdoc, he became a faculty member of the University of Tokyo in 1993. He has published over 150 refereed papers to make significant contributions to various areas of climate dynamics, including mechanisms for atmospheric blocking, teleconnection patterns and storm-tracks. In addition, as the lead PI of a nation-wide project on extratropical air-sea interaction, he has contributed to revealing active roles of warm ocean currents and associated sea-surface fronts in shaping extratropical jets/storm-tracks and their variability, in addition to organization of cloud/precipitation systems. He acted as t. He acts as the chair of the Advisory Panel on Extreme Climate Events of the Japan Meteorological Agency.
Seminar link: Interested? Register with this form to get the seminar link [only for the above talk(s)].
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BCCR Monday seminar is a weekly forum for the presentation of research connected to the Bjerknes Centre for Climate Research. Some of the talks are given by international visitors but the majority are presented by internal researchers. If you are interested to receive the seminar information and the zoom link regularly, you can send an email to Laura Dietrich <Laura.Dietrich@uib.no> and subscribe to the mailing list.
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