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Hi everyone,</div>
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Just a reminder of the EOAS Colloquium today - 3pm in 1050 - Speaker: Caroline Ummenhofer from the Department of Physical Oceanography at Woods Hole Oceanographic Institution.</div>
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The title has been slightly updated as follows:</div>
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<b>Impacts of multi-decadal Pacific variability on the Indian Ocean / A Breeze from the past: Mining climate clues from whaling logbooks</b></div>
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The Indo-Pacific exhibits strong multi-decadal variability, with far-reaching implications for hydroclimate in surrounding regions, especially in Indian Ocean rim countries with societies particularly vulnerable to anthropogenic climate change. It is therefore
of interest to better understand how multi-decadal variability across the Indo-Pacific affects Indian Ocean characteristics, including its leading mode of variability, the Indian Ocean Dipole. Mechanisms will be discussed how multi-decadal Pacific variability
is transmitted to the Indian Ocean through oceanic and atmospheric pathways, including via the Indonesian Throughflow and the Walker circulation, using a suite of ocean and climate model simulations. Implications of the low-frequency changes for interannual
variability in the Indian Ocean and extreme events across the region, also in a paleoclimate context, will be discussed.</div>
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Maritime weather data contained in ship logbooks are used to assess historical changes in global wind patterns. We focus on unexploited caches of archival documentation, namely U.S. whaling logbooks of voyages spanning the period 1820 to 1890 from New England
archives. The logbooks, often covering multi-year voyages around the globe, contain systematic weather observations (e.g., wind strength/direction, sea state, precipitation) at daily to sub-daily temporal resolution. The qualitative, descriptive recordings
of wind strength and direction by the whalers are quantified and compared with reanalysis products where applicable. Following extensive quality control, we find overall good agreement in wind strength and direction for the whaling logbook wind records with
reanalysis products. There are indications that long-term changes in winds (e.g., in the Southern Ocean) and variations in wind fields associated with modes of variability, such as the North Atlantic Oscillation, are also captured by the whaling ship records.
Our results demonstrate that the historical records can provide a long-term context for changing maritime wind patterns in remote ocean regions lacking instrumental data during the 19th century.</div>
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Cheers,</div>
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Rhys</div>
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Associate Professor, EOAS</div>
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<div id="divRplyFwdMsg" dir="ltr"><span style="font-family: Calibri, sans-serif; font-size: 11pt; color: rgb(0, 0, 0);"><b>From:</b> Rhys Parfitt <rparfitt@fsu.edu><br>
<b>Sent:</b> Monday, October 14, 2024 11:27 AM<br>
<b>To:</b> eoas-seminar@lists.fsu.edu <eoas-seminar@lists.fsu.edu><br>
<b>Subject:</b> EOAS Colloquium - Friday Oct 18th - Caroline Ummenhofer</span>
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Dear all,</div>
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Please join us this Friday for the EOAS Colloquium, where our invited guest speaker is Caroline Ummenhofer, from Woods Hole Oceanographic Institution. Caroline will give a talk on "<b>Impacts of multi-decadal Pacific variability on the Indian Ocean</b>", please
see below for the abstract. </div>
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Location and Time: Friday October 18th, EOAS 1050, 3:00PM. </div>
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Caroline will be visiting EOAS on Thursday and Friday - please let me know if you would like to meet with her.
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Cheers, </div>
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Rhys</div>
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<u>Abstract</u></div>
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The Indo-Pacific exhibits strong multi-decadal variability, with far-reaching implications for hydroclimate in surrounding regions, especially in Indian Ocean rim countries with societies particularly vulnerable to anthropogenic climate change. It is therefore
of interest to better understand how multi-decadal variability across the Indo-Pacific affects Indian Ocean characteristics, including its leading mode of variability, the Indian Ocean Dipole. Mechanisms will be discussed how multi-decadal Pacific variability
is transmitted to the Indian Ocean through oceanic and atmospheric pathways, including via the Indonesian Throughflow and the Walker circulation, using a suite of ocean and climate model simulations. In addition, significant changes in heat and freshwater
transport have been recorded in recent decades in the Indian Ocean and the Maritime Continent region. Implications of these observed low-frequency changes for interannual to decadal variability in the Indian Ocean and extreme events across the region will
be discussed.</div>
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