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      <p class="MsoNormal">Dear Colleagues,</p>
      <p class="MsoNormal"><br>
      </p>
      <p class="MsoNormal"> A 1-day Zoom mini-workshop on pressure
        seafloor geodesy will be held on March 15<sup>th</sup>, 2022.
        This mini-workshop will bring together a group of geophysicists
        and physical oceanographers to discuss the challenges and
        opportunities of pressure seafloor geodesy and continental
        margin circulations.<span style="mso-spacerun:yes">  </span>It
        will also explore potential synergies and start the process of
        developing plans for closer collaboration between the two
        communities. </p>
      <p class="MsoNormal"> </p>
      <p class="MsoNormal">Please register here as soon as possible but
        no later than February 4<sup>th</sup>, 2022: <a
          href="https://forms.gle/2cKPnEpjB6QorCwB8"
          class="moz-txt-link-freetext" moz-do-not-send="true">https://forms.gle/2cKPnEpjB6QorCwB8</a></p>
      <p class="MsoNormal"> </p>
      <p class="MsoNormal">This mini-workshop will be held tentatively
        between 8 AM – 4 PM (Hawaii Time) on March 15<sup>th</sup>,
        2022. You may choose to attend only part of it due to time
        difference and other commitments. There is a question about this
        in the registration. </p>
      <p class="MsoNormal"> </p>
      <p class="MsoNormal">Please note that there is a session on March
        4<sup>th</sup>, 2022 in the Ocean Sciences Meeting, <i>OT18
          Seafloor geodesy: An oceanographic perspective</i>, that
        overlaps the content of our workshop.<span
          style="mso-spacerun:yes">  </span>You will be required to
        register the meeting to join that session. However, our 1-day
        ZOOM mini-workshop will be free of charge and open to all.
        During the ZOOM mini-workshop, we will provide short highlights
        of the ocean sciences session. </p>
      <p class="MsoNormal"> </p>
      <p class="MsoNormal"><b>Motivation</b></p>
      <p class="MsoNormal"> </p>
      <p class="MsoNormal">On land, dense networks of GNSS receivers and
        frequent InSAR observations have transformed our understanding
        of the deformation associated with plate boundaries and
        volcanoes. In the oceans, geodesy is more challenging, but is
        critical for addressing many important problems, including
        understanding the patterns of coupling and strain release on
        megathrust faults in subduction zones. </p>
      <p class="MsoNormal"> </p>
      <p class="MsoNormal">A fundamental challenge of pressure seafloor
        geodesy is discriminating geodetic signals from those associated
        with oceanography. Tides can be easily filtered but the seafloor
        pressure signals related to other oceanographic processes can
        swamp those from slow-slip events and are hard to remove. At
        present, the two most common approaches to removing
        oceanographic signals are (1) the use of a reference station
        under the assumption that oceanography is spatially invariant on
        the scales of interest and (2) the use of the pressure
        predictions from global or regional circulation models that have
        been developed by physical oceanographers primarily to study
        circulation patterns in the upper ocean. Neither of these
        approaches fully remove oceanographic signals and as a result
        the detection threshold of pressure geodesy is quite high and
        there can be ambiguity in the details of the events that are
        detected.</p>
      <p class="MsoNormal"> </p>
      <p class="MsoNormal">On one hand, improved corrections require a
        better understanding of the physical oceanographic processes
        that affect seafloor pressure and ultimately the development of
        better models. On the other hand, data collected by
        geophysicists for seafloor geodesy can be used to constrain the
        models that physical oceanographers have developed. There are
        clearly opportunities for synergistic interactions between
        geophysicists and physical oceanographers. However, such
        synergies have not been explored very extensively, and there is
        quite limited involvement of physical oceanographers in seafloor
        geodesy. </p>
      <p class="MsoNormal"> </p>
      <p class="MsoNormal"><b>Expected outcomes</b></p>
      <p class="MsoNormal"> </p>
      <p class="MsoNormal">A short report will be produced based on the
        discussions during the mini-workshop. The report will outline
        the challenges, list specific approaches to improving pressure
        geodesy through enhanced collaborations, and make
        recommendations for future interactions. Depending on the
        discussions during this mini-workshop, an in-person workshop
        might be held later in 2022 or early 2023.</p>
      <p class="MsoNormal"> </p>
      <p class="MsoNormal"><b>Confirmed participants</b></p>
      <p class="MsoNormal"> </p>
      <p class="MsoNormal">Because prior discussions have been mostly
        within the marine geophysical community, we have confirmed the
        participation of the following physical oceanographers in order
        to ensure a quorum from that community:</p>
      <p class="MsoListParagraphCxSpFirst"
        style="text-indent:-.25in;mso-list:l1 level1 lfo2"><span
style="font-family:Symbol;mso-fareast-font-family:Symbol;mso-bidi-font-family:Symbol"><span
            style="mso-list:Ignore">·<span style="font:7.0pt "Times
              New Roman"">      </span></span></span>Alan
        Wallcraft (Florida State University)</p>
      <p class="MsoListParagraphCxSpMiddle"
        style="text-indent:-.25in;mso-list:l1 level1 lfo2"><span
style="font-family:Symbol;mso-fareast-font-family:Symbol;mso-bidi-font-family:Symbol"><span
            style="mso-list:Ignore">·<span style="font:7.0pt "Times
              New Roman"">      </span></span></span>Bruce
        Cornuelle (Scripps Institution of Oceanography)</p>
      <p class="MsoListParagraphCxSpMiddle"
        style="text-indent:-.25in;mso-list:l1 level1 lfo2"><span
style="font-family:Symbol;mso-fareast-font-family:Symbol;mso-bidi-font-family:Symbol"><span
            style="mso-list:Ignore">·<span style="font:7.0pt "Times
              New Roman"">      </span></span></span>Chris Hughes
        (University of Liverpool)</p>
      <p class="MsoListParagraphCxSpMiddle"
        style="text-indent:-.25in;mso-list:l1 level1 lfo2"><span
style="font-family:Symbol;mso-fareast-font-family:Symbol;mso-bidi-font-family:Symbol"><span
            style="mso-list:Ignore">·<span style="font:7.0pt "Times
              New Roman"">      </span></span></span>Daisuke Inazu
        (Tokyo University of Marine Science and Technology)</p>
      <p class="MsoListParagraphCxSpMiddle"
        style="text-indent:-.25in;mso-list:l1 level1 lfo2"><span
style="font-family:Symbol;mso-fareast-font-family:Symbol;mso-bidi-font-family:Symbol"><span
            style="mso-list:Ignore">·<span style="font:7.0pt "Times
              New Roman"">      </span></span></span>Kenneth Brink
        (Woods Hole Oceanographic Institute)</p>
      <p class="MsoListParagraphCxSpMiddle"
        style="text-indent:-.25in;mso-list:l1 level1 lfo2"><span
style="font-family:Symbol;mso-fareast-font-family:Symbol;mso-bidi-font-family:Symbol"><span
            style="mso-list:Ignore">·<span style="font:7.0pt "Times
              New Roman"">      </span></span></span>Parker
        McCready (University of Washington)</p>
      <p class="MsoListParagraphCxSpLast"
        style="text-indent:-.25in;mso-list:l1 level1 lfo2"><span
style="font-family:Symbol;mso-fareast-font-family:Symbol;mso-bidi-font-family:Symbol"><span
            style="mso-list:Ignore">·<span style="font:7.0pt "Times
              New Roman"">      </span></span></span>Randy Watts
        (University of Rhode Island)</p>
      <p class="MsoNormal"> </p>
      <p class="MsoNormal">Our hope is that this mini-workshop will
        attract the participation of a diverse group of scientists, and
        we particularly encourage early career participants. Please
        share this announcement widely with colleagues who you think
        might be interested.</p>
      <p class="MsoNormal"> </p>
      <p class="MsoNormal">This mini-workshop follows on from some
        discussions at last April’s <i>Future Directions in Seafloor
          Geodesy Community Workshop</i>, which was attended primarily
        by the marine geophysics community. The workshop report can be
        found here <span style="mso-spacerun:yes"> </span><a
href="https://sites.google.com/view/seafloor-geodesy-community/virtual-workshop"
          class="moz-txt-link-freetext" moz-do-not-send="true">https://sites.google.com/view/seafloor-geodesy-community/virtual-workshop</a>.</p>
      <p class="MsoNormal"><br>
      </p>
      <p class="MsoNormal"><b>Organizers</b></p>
      <p class="MsoListParagraphCxSpFirst"
        style="text-indent:-.25in;mso-list:l0 level1 lfo1"><span
style="font-family:Symbol;mso-fareast-font-family:Symbol;mso-bidi-font-family:Symbol"><span
            style="mso-list:Ignore">·<span style="font:7.0pt "Times
              New Roman"">      </span></span></span>Matt Wei
        (University of Rhode Island)</p>
      <p class="MsoListParagraphCxSpLast"
        style="text-indent:-.25in;mso-list:l0 level1 lfo1"><span
style="font-family:Symbol;mso-fareast-font-family:Symbol;mso-bidi-font-family:Symbol"><span
            style="mso-list:Ignore">·<span style="font:7.0pt "Times
              New Roman"">      </span></span></span>William
        Wilcock (University of Washington)</p>
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      <pre class="moz-signature" cols="72">Meng "Matt" Wei
Associate Professor
Graduate School of Oceanography
University of Rhode Island

Tel: (401)874-6530 | <a class="moz-txt-link-freetext" href="https://weilaburi.wixsite.com/home" moz-do-not-send="true">https://weilaburi.wixsite.com/home</a></pre>
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