mjo and monsoons

PCMDI · lee1043 · Nov 4, 2020 · Nov 4, 2020 · Nov 4, 2020 · Nov 4, 2020
commit fd2d5f3028e167fc1968b53d0048fb002647a9cb
diff --git a/docs/_sources/metrics-overview.rst.txt b/docs/_sources/metrics-overview.rst.txt
@@ -17,5 +17,7 @@ We provide documentation along with demos to assist users of the PMP. Most demo
  subdaily-precipitation
  extrop-mov
  clivar-enso-metrics
+ mjo
+ monsoon
 
 
diff --git a/docs/_sources/mjo.rst.txt b/docs/_sources/mjo.rst.txt
@@ -0,0 +1,35 @@
+.. _subdaily-precipitation:
+
+*****************
+MJO baseline metrics
+*****************
+
+Overview
+========
+
+The MJO consists of large-scale regions of enhanced and suppressed convection, and associated circulation anomalies in the tropics that propagate eastward, mainly over the eastern hemisphere, with a time scale of ~30-60 days (Madden and Julian 1971, 1972, 1994). Its large-scale nature and period are easily seen via frequency-wavenumber decomposition of near-equatorial data (10°S to 10°N), which partitions the raw anomalies into eastward and westward propagating components and also as a function of frequency (cycles/day). The frequency-wavenumber decomposition technique has been widely used to assess if models properly represent this basic characteristic of the MJO (e.g., CLIVAR MJO Working Group 2009; Kim et al. 2009; Ahn et al. 2017).
+
+
+Here we apply the frequency-wavenumber decomposition method to precipitation from observations (GPCP-based; 1997-2010) and the CMIP5 and CMIP6 Historical simulations for 1985-2004. For disturbances with wavenumbers 1-3 and frequencies corresponding to 30-60 days it is clear in observations that the eastward propagating signal dominates over its westward propagating counterpart. Thus, an important metric is the eastward/westward power ratio (EWR) for the above-mentioned wavenumbers and frequencies, which is about 2.5 in observations.
+
+
+The EWR results are based on the work of Ahn et al. (2017). Implementation of these and other MJO analysis into the PMP is part of a PCMDI collaboration with Prof. Daehyun Kim (University of Washington), his group, and the WGNE MJO Task Force.
+
+References
+==========
+
+
+
+Ahn, M.-S., D. Kim, K. R. Sperber, I.-S. Kang, E. Maloney, D. Waliser, H. Hendon, 2017: MJO simulation in CMIP5 climate models: MJO skill metrics and process-oriented diagnosis. Clim. Dynam., 49, 4023-4045. doi: 10.1007/s00382-017-3558-4.
+
+CLIVAR Madden-Julian Oscillation Working Group (Waliser, D., K. Sperber, H. Hendon, D. Kim, E. Maloney, M. Wheeler, K. Weickmann,, C. Zhang, L. Donner, J. Gottschalck, W. Higgins, I.-S. Kang, D. Legler, M. Moncrieff, S. Schubert, W. Stern, F. Vitart, B. Wang, W. Wang, and S. Woolnough), 2009: MJO simulation diagnostics. J. Clim., 22, 3006-3029. doi: 10.1175/2008JCLI2731.1.
+
+Kim, D., K. R. Sperber, W. S. Stern, D. Waliser, I.-S. Kang, E. Maloney, W. Wang, K. Weickmann, J. Benedict, M. Khairoutdinov, M.-I. Lee, R. Neale, M. Suarez, K. Thayer-Calder, and G. Zhang, 2009: Application of MJO simulation diagnostics to climate models. J. Clim., 22, 6413-6436. doi: 10.1175/2009JCLI3063.1.
+
+Madden, R. A., and P. R. Julian, 1971: Detection of a 40–50 day oscillation in the zonal wind in the tropical Pacific. J. Atmos. Sci., 28, 702–708. doi: 10.1175/1520-0469(1971)028<0702:DOADOI>2.0.CO;2
+
+Madden, R. A., and P. R. Julian, 1972: Description of global-scale circulation cells in the tropics with a 40–50 day period. J. Atmos. Sci., 29, 1109–1123. doi: 10.1175/1520-0469(1972)029<1109:DOGSCC>2.0.CO;2
+
+Madden, R. A., and P. R. Julian, 1994: Observations of the 40–50-day tropical oscillation—A review. Mon. Wea. Rev., 122, 814–837. doi: 10.1175/1520-0493(1994)122<0814:OOTDTO>2.0.CO;2
+
+
diff --git a/docs/_sources/monsoon.rst.txt b/docs/_sources/monsoon.rst.txt
@@ -0,0 +1,19 @@
+.. _Monsoon-example:
+
+*****************
+Monsoon examples
+*****************
+
+Overview
+========
+
+The PMP currently can be used to produce baseline metrics on the overall evolution and pattern of regional monsoons.
+
+These evolution results are based on the work of Sperber and Annamalai (2014). Climatological pentads of precipitation in observations and CMIP5 for six monsoon-related domains (AIR: All-India Rainfall, AUS: Australian Monsoon, GoG: Gulf of Guinea, NAM: North American Monsoon, SAM: South American Monsoon, and Sahel). In the Northern Hemisphere the 73 climatological pentads run from January-December, while in the Southern Hemisphere the climatological pentads run from July-June. For each domain the precipitation is accumulated at each subsequent pentad and then divided by the total precipitation to give the fractional accumulation of precipitation as a function of pentad. Except for GoG, onset (decay) of monsoon occurs for a fractional accumulation of 0.2 (0.8). Between these fractional accumulations the accumulation of precipitation is nearly linear as the monsoon season progresses.
+
+
+
+References
+==========
+
+Sperber, K.R. and Annamalai, H., 2014. The use of fractional accumulated precipitation for the evaluation of the annual cycle of monsoons. Climate Dynamics, 43, 3219-3244, doi:10.1007/s00382-014-2099-3
diff --git a/docs/clivar-enso-metrics.html b/docs/clivar-enso-metrics.html
@@ -36,7 +36,7 @@
 
  <link rel="index" title="Index" href="genindex.html" />
  <link rel="search" title="Search" href="search.html" />
- <link rel="next" title="Miscellaneous" href="pmpparser.html" />
+ <link rel="next" title="MJO baseline metrics" href="mjo.html" />
  <link rel="prev" title="Extra-tropical modes of variability" href="extrop-mov.html" /> 
 </head>
 
@@ -96,6 +96,8 @@
 <li class="toctree-l4"><a class="reference internal" href="#overview">Overview</a></li>
 </ul>
 </li>
+<li class="toctree-l3"><a class="reference internal" href="mjo.html">MJO baseline metrics</a></li>
+<li class="toctree-l3"><a class="reference internal" href="monsoon.html">Sub-daily precipitation</a></li>
 </ul>
 </li>
 </ul>
@@ -184,7 +186,7 @@ <h2>Overview<a class="headerlink" href="#overview" title="Permalink to this head
 
  <div class="rst-footer-buttons" role="navigation" aria-label="footer navigation">
 
- <a href="pmpparser.html" class="btn btn-neutral float-right" title="Miscellaneous" accesskey="n" rel="next">Next <span class="fa fa-arrow-circle-right"></span></a>
+ <a href="mjo.html" class="btn btn-neutral float-right" title="MJO baseline metrics" accesskey="n" rel="next">Next <span class="fa fa-arrow-circle-right"></span></a>
 
 
  <a href="extrop-mov.html" class="btn btn-neutral float-left" title="Extra-tropical modes of variability" accesskey="p" rel="prev"><span class="fa fa-arrow-circle-left"></span> Previous</a>

diff --git a/docs/extrop-mov.html b/docs/extrop-mov.html
@@ -96,6 +96,8 @@
 </ul>
 </li>
 <li class="toctree-l3"><a class="reference internal" href="clivar-enso-metrics.html">CLIVAR 2020 ENSO Metrics</a></li>
+<li class="toctree-l3"><a class="reference internal" href="mjo.html">MJO baseline metrics</a></li>
+<li class="toctree-l3"><a class="reference internal" href="monsoon.html">Sub-daily precipitation</a></li>
 </ul>
 </li>
 </ul>

diff --git a/docs/mean-climate.html b/docs/mean-climate.html
@@ -96,6 +96,8 @@
 <li class="toctree-l3"><a class="reference internal" href="subdaily-precipitation.html">Sub-daily precipitation</a></li>
 <li class="toctree-l3"><a class="reference internal" href="extrop-mov.html">Extra-tropical modes of variability</a></li>
 <li class="toctree-l3"><a class="reference internal" href="clivar-enso-metrics.html">CLIVAR 2020 ENSO Metrics</a></li>
+<li class="toctree-l3"><a class="reference internal" href="mjo.html">MJO baseline metrics</a></li>
+<li class="toctree-l3"><a class="reference internal" href="monsoon.html">Sub-daily precipitation</a></li>
 </ul>
 </li>
 </ul>

diff --git a/docs/metrics-overview.html b/docs/metrics-overview.html
@@ -93,6 +93,8 @@
 <li class="toctree-l3"><a class="reference internal" href="subdaily-precipitation.html">Sub-daily precipitation</a></li>
 <li class="toctree-l3"><a class="reference internal" href="extrop-mov.html">Extra-tropical modes of variability</a></li>
 <li class="toctree-l3"><a class="reference internal" href="clivar-enso-metrics.html">CLIVAR 2020 ENSO Metrics</a></li>
+<li class="toctree-l3"><a class="reference internal" href="mjo.html">MJO baseline metrics</a></li>
+<li class="toctree-l3"><a class="reference internal" href="monsoon.html">Monsoon examples</a></li>
 </ul>
 </li>
 </ul>
@@ -174,6 +176,8 @@ <h2>Overview<a class="headerlink" href="#overview" title="Permalink to this head
 <li class="toctree-l1"><a class="reference internal" href="subdaily-precipitation.html">Sub-daily precipitation</a></li>
 <li class="toctree-l1"><a class="reference internal" href="extrop-mov.html">Extra-tropical modes of variability</a></li>
 <li class="toctree-l1"><a class="reference internal" href="clivar-enso-metrics.html">CLIVAR 2020 ENSO Metrics</a></li>
+<li class="toctree-l1"><a class="reference internal" href="mjo.html">MJO baseline metrics</a></li>
+<li class="toctree-l1"><a class="reference internal" href="monsoon.html">Monsoon examples</a></li>
 </ul>
 </div>
 </div>

diff --git a/docs/mjo.html b/docs/mjo.html
@@ -0,0 +1,249 @@
+
+
+<!DOCTYPE html>
+<html class="writer-html5" lang="en" >
+<head>
+ <meta charset="utf-8">
+
+ <meta name="viewport" content="width=device-width, initial-scale=1.0">
+
+ <title>MJO baseline metrics &mdash; PCMDI Metrics 1.2.1 documentation</title>
+
+
+
+ <link rel="stylesheet" href="_static/css/theme.css" type="text/css" />
+ <link rel="stylesheet" href="_static/pygments.css" type="text/css" />
+
+
+
+
+
+
+
+ <!--[if lt IE 9]>
+ <script src="_static/js/html5shiv.min.js"></script>
+ <![endif]-->
+
+
+ <script type="text/javascript" id="documentation_options" data-url_root="./" src="_static/documentation_options.js"></script>
+ <script src="_static/jquery.js"></script>
+ <script src="_static/underscore.js"></script>
+ <script src="_static/doctools.js"></script>
+ <script src="_static/language_data.js"></script>
+
+ <script type="text/javascript" src="_static/js/theme.js"></script>
+
+
+ <link rel="index" title="Index" href="genindex.html" />
+ <link rel="search" title="Search" href="search.html" />
+ <link rel="next" title="Monsoon examples" href="monsoon.html" />
+ <link rel="prev" title="CLIVAR 2020 ENSO Metrics" href="clivar-enso-metrics.html" /> 
+</head>
+
+<body class="wy-body-for-nav">
+
+
+ <div class="wy-grid-for-nav">
+
+ <nav data-toggle="wy-nav-shift" class="wy-nav-side">
+ <div class="wy-side-scroll">
+ <div class="wy-side-nav-search" >
+
+
+
+ <a href="index.html" class="icon icon-home" alt="Documentation Home"> PCMDI Metrics
+
+
+
+ </a>
+
+
+
+
+
+
+
+<div role="search">
+ <form id="rtd-search-form" class="wy-form" action="search.html" method="get">
+ <input type="text" name="q" placeholder="Search docs" />
+ <input type="hidden" name="check_keywords" value="yes" />
+ <input type="hidden" name="area" value="default" />
+ </form>
+</div>
+
+
+ </div>
+
+
+ <div class="wy-menu wy-menu-vertical" data-spy="affix" role="navigation" aria-label="main navigation">
+
+
+
+
+
+
+ <p class="caption"><span class="caption-text">Contents:</span></p>
+<ul class="current">
+<li class="toctree-l1"><a class="reference internal" href="Technical-overview.html">Usage Overview</a></li>
+<li class="toctree-l1"><a class="reference internal" href="install.html">Install using Anaconda</a></li>
+<li class="toctree-l1"><a class="reference internal" href="Supporting-data.html">Retrieving data for demos and use of the PMP</a></li>
+<li class="toctree-l1 current"><a class="reference internal" href="metrics-overview.html">Documentation and Demos</a><ul class="current">
+<li class="toctree-l2 current"><a class="reference internal" href="metrics-overview.html#overview">Overview</a><ul class="current">
+<li class="toctree-l3"><a class="reference internal" href="mean-climate.html">Mean Climate</a></li>
+<li class="toctree-l3"><a class="reference internal" href="subdaily-precipitation.html">Sub-daily precipitation</a></li>
+<li class="toctree-l3"><a class="reference internal" href="extrop-mov.html">Extra-tropical modes of variability</a></li>
+<li class="toctree-l3"><a class="reference internal" href="clivar-enso-metrics.html">CLIVAR 2020 ENSO Metrics</a></li>
+<li class="toctree-l3 current"><a class="current reference internal" href="#">MJO baseline metrics</a><ul>
+<li class="toctree-l4"><a class="reference internal" href="#overview">Overview</a></li>
+<li class="toctree-l4"><a class="reference internal" href="#references">References</a></li>
+</ul>
+</li>
+<li class="toctree-l3"><a class="reference internal" href="monsoon.html">Monsoon examples</a></li>
+</ul>
+</li>
+</ul>
+</li>
+<li class="toctree-l1"><a class="reference internal" href="pmpparser.html">Miscellaneous</a></li>
+</ul>
+
+
+
+ </div>
+
+ </div>
+ </nav>
+
+ <section data-toggle="wy-nav-shift" class="wy-nav-content-wrap">
+
+
+ <nav class="wy-nav-top" aria-label="top navigation">
+
+ <i data-toggle="wy-nav-top" class="fa fa-bars"></i>
+ <a href="index.html">PCMDI Metrics</a>
+
+ </nav>
+
+
+ <div class="wy-nav-content">
+
+ <div class="rst-content">
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+<div role="navigation" aria-label="breadcrumbs navigation">
+
+ <ul class="wy-breadcrumbs">
+
+ <li><a href="index.html" class="icon icon-home"></a> &raquo;</li>
+
+ <li><a href="metrics-overview.html">Documentation and Demos</a> &raquo;</li>
+
+ <li>MJO baseline metrics</li>
+
+
+ <li class="wy-breadcrumbs-aside">
+
+
+ <a href="_sources/mjo.rst.txt" rel=""> View page source</a>
+
+
+ </li>
+
+ </ul>
+
+
+ <hr/>
+</div>
+ <div role="main" class="document" itemscope="itemscope" itemtype="http:https://schema.org/Article">
+ <div itemprop="articleBody">
+
+ <div class="section" id="mjo-baseline-metrics">
+<span id="subdaily-precipitation"></span><h1>MJO baseline metrics<a class="headerlink" href="#mjo-baseline-metrics" title="Permalink to this headline">¶</a></h1>
+<div class="section" id="overview">
+<h2>Overview<a class="headerlink" href="#overview" title="Permalink to this headline">¶</a></h2>
+<p>The MJO consists of large-scale regions of enhanced and suppressed convection, and associated circulation anomalies in the tropics that propagate eastward, mainly over the eastern hemisphere, with a time scale of ~30-60 days (Madden and Julian 1971, 1972, 1994). Its large-scale nature and period are easily seen via frequency-wavenumber decomposition of near-equatorial data (10°S to 10°N), which partitions the raw anomalies into eastward and westward propagating components and also as a function of frequency (cycles/day). The frequency-wavenumber decomposition technique has been widely used to assess if models properly represent this basic characteristic of the MJO (e.g., CLIVAR MJO Working Group 2009; Kim et al. 2009; Ahn et al. 2017).</p>
+<p>Here we apply the frequency-wavenumber decomposition method to precipitation from observations (GPCP-based; 1997-2010) and the CMIP5 and CMIP6 Historical simulations for 1985-2004. For disturbances with wavenumbers 1-3 and frequencies corresponding to 30-60 days it is clear in observations that the eastward propagating signal dominates over its westward propagating counterpart. Thus, an important metric is the eastward/westward power ratio (EWR) for the above-mentioned wavenumbers and frequencies, which is about 2.5 in observations.</p>
+<p>The EWR results are based on the work of Ahn et al. (2017). Implementation of these and other MJO analysis into the PMP is part of a PCMDI collaboration with Prof. Daehyun Kim (University of Washington), his group, and the WGNE MJO Task Force.</p>
+</div>
+<div class="section" id="references">
+<h2>References<a class="headerlink" href="#references" title="Permalink to this headline">¶</a></h2>
+<p>Ahn, M.-S., D. Kim, K. R. Sperber, I.-S. Kang, E. Maloney, D. Waliser, H. Hendon, 2017: MJO simulation in CMIP5 climate models: MJO skill metrics and process-oriented diagnosis. Clim. Dynam., 49, 4023-4045. doi: 10.1007/s00382-017-3558-4.</p>
+<p>CLIVAR Madden-Julian Oscillation Working Group (Waliser, D., K. Sperber, H. Hendon, D. Kim, E. Maloney, M. Wheeler, K. Weickmann,, C. Zhang, L. Donner, J. Gottschalck, W. Higgins, I.-S. Kang, D. Legler, M. Moncrieff, S. Schubert, W. Stern, F. Vitart, B. Wang, W. Wang, and S. Woolnough), 2009: MJO simulation diagnostics. J. Clim., 22, 3006-3029. doi: 10.1175/2008JCLI2731.1.</p>
+<p>Kim, D., K. R. Sperber, W. S. Stern, D. Waliser, I.-S. Kang, E. Maloney, W. Wang, K. Weickmann, J. Benedict, M. Khairoutdinov, M.-I. Lee, R. Neale, M. Suarez, K. Thayer-Calder, and G. Zhang, 2009: Application of MJO simulation diagnostics to climate models. J. Clim., 22, 6413-6436. doi: 10.1175/2009JCLI3063.1.</p>
+<p>Madden, R. A., and P. R. Julian, 1971: Detection of a 40–50 day oscillation in the zonal wind in the tropical Pacific. J. Atmos. Sci., 28, 702–708. doi: 10.1175/1520-0469(1971)028&lt;0702:DOADOI&gt;2.0.CO;2</p>
+<p>Madden, R. A., and P. R. Julian, 1972: Description of global-scale circulation cells in the tropics with a 40–50 day period. J. Atmos. Sci., 29, 1109–1123. doi: 10.1175/1520-0469(1972)029&lt;1109:DOGSCC&gt;2.0.CO;2</p>
+<p>Madden, R. A., and P. R. Julian, 1994: Observations of the 40–50-day tropical oscillation—A review. Mon. Wea. Rev., 122, 814–837. doi: 10.1175/1520-0493(1994)122&lt;0814:OOTDTO&gt;2.0.CO;2</p>
+</div>
+</div>
+
+
+ </div>
+
+ </div>
+ <footer>
+
+ <div class="rst-footer-buttons" role="navigation" aria-label="footer navigation">
+
+ <a href="monsoon.html" class="btn btn-neutral float-right" title="Monsoon examples" accesskey="n" rel="next">Next <span class="fa fa-arrow-circle-right"></span></a>
+
+
+ <a href="clivar-enso-metrics.html" class="btn btn-neutral float-left" title="CLIVAR 2020 ENSO Metrics" accesskey="p" rel="prev"><span class="fa fa-arrow-circle-left"></span> Previous</a>
+
+ </div>
+
+
+ <hr/>
+
+ <div role="contentinfo">
+ <p>
+
+ &copy; Copyright 2020 PCMDI
+
+ </p>
+ </div>
+
+
+
+ Built with <a href="http:https://sphinx-doc.org/">Sphinx</a> using a
+
+ <a href="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/rtfd/sphinx_rtd_theme">theme</a>
+
+ provided by <a href="https://readthedocs.org">Read the Docs</a>. 
+
+</footer>
+
+ </div>
+ </div>
+
+ </section>
+
+ </div>
+
+
+ <script type="text/javascript">
+ jQuery(function () {
+ SphinxRtdTheme.Navigation.enable(true);
+ });
+ </script>
+
+
+
+
+
+
+</body>
+</html>