Integrated daily Photosynthetically Available Radiation (PAR) data from RVIB Nathaniel B. Palmer cruises NBP0103, NBP0104, NBP0202, and NBP0204 in the Southern Ocean from 2001-2002 (SOGLOBEC project)

<h3>Photosynthetically Available Radiation (PAR) Data<br />
from broadscale cruises NBP0103, NBP0104, NBP0202 and NBP0204</h3>

<p><strong>Instrument Notes:</strong><br />
Biospherical Instruments GUV-500 is a 5-channel reference radiometer which typically measures cosine-corrected down welling irradiance at 305, 320, 340, 380nm and PAR (400-700nm). Cosine irradiance (EsPAR) sensors collect light impinging on a Teflon-coated diffuser and the response is proportional to the cosine of the angle of incidence.</p>

<p>Biospherical Instruments QSR250 system measures a single channel of scalar irradiance (PAR) and is appropriate for applications independent of the directionality of the light field, such as measurements of the flux available for photosynthesis.<br />
<em>-- Biospherical Instruments </em></p>

<p><strong>Data Notes: </strong><br />
1. The cosine PAR value for yrday_gmt 151 year 2001 is an estimate, based on a conversion from data recorded by the QSR240 scalar sensor package.<br />
2. Latitude and longitude have been added to this data set by the Data Management Office. These positions are the noon (12:00 hour) positions reported in the ship's alongtrack data set.<br />
3. Scalar PAR data was extracted from the ship's alongtrack meteorological data set. The sensor package was mounted on ship's science mast.</p>

<p><strong>Methods:</strong><br />
For additional information on methods see the on-line cruise reports, (Primary Production Sections) <a href=\"http://globec.whoi.edu/so-dir/reports/nbp0103/nbp0103.html\">nbp0103</a>, <a href=\"http://globec.whoi.edu/jg/serv/globec/soglobec/inventory.html2%7Bdir=globec.whoi.edu/jg/dir/globec/soglobec/,info=globec.whoi.edu/jg/info/globec/soglobec/inventory%7D?project%20eq%20NBP0104,data_type%20eq%20cruise_report\">nbp0104 </a>, <a href=\"http://globec.whoi.edu/so-dir/reports/nbp0202/nbp0202b.html#TOC1_6\">nbp0202</a>, and <a href=\"http://globec.whoi.edu/so-dir/reports/nbp0204/nbp0204b.html#TOC1_8\">nbp0204</a>.</p>

<p><strong>Data contributed by:</strong><br />
Maria Vernet<br />
Integrative Oceanographic Division<br />
Scripps Institution of Oceanography<br />
University of California San Diego<br />
La Jolla, California 92093-0218</p>

<p>Phone: [phone]<br />
E-mail: <a href=\"mailto:[e-mail]\">[e-mail]</a></p>

<p><em>Last updated: December 09, 2005; gfh</em></p>

<h3>光合有效辐射（Photosynthetically Available Radiation, PAR）数据<br />
来自大范围科考航次NBP0103、NBP0104、NBP0202及NBP0204</h3>

<p><strong>仪器说明：</strong><br />
生物光学仪器公司（Biospherical Instruments）GUV-500型为5通道参考辐射计，通常可在305nm、320nm、340nm、380nm及PAR（400~700nm）波段测量余弦校正下行辐照度。余弦辐照度（EsPAR）传感器采集入射至特氟龙涂层漫射体的光信号，其响应强度与入射光角度的余弦值成正比。</p>

<p>生物光学仪器公司QSR250系统可单通道测量标量辐照度（PAR），适用于无需考虑光场方向性的应用场景，例如光合可用通量的测量。<br />
<em>——生物光学仪器公司</em></p>

<p><strong>数据说明：</strong><br />
1. 2001年第151天（格林尼治时间）的余弦PAR值为估算值，基于QSR240标量传感器组采集数据的转换结果。<br />
2. 数据管理办公室已为本次数据集添加经纬度信息，该位置信息取自船舶沿航迹数据集中记录的正午（12:00时）船位。<br />
3. 标量PAR数据提取自船舶沿航迹气象数据集，传感器组安装于船舶科考桅杆之上。</p>

<p><strong>研究方法：</strong><br />
有关研究方法的更多细节，请参阅在线航次报告（初级生产章节）：<a href="http://globec.whoi.edu/so-dir/reports/nbp0103/nbp0103.html">nbp0103</a>、<a href="http://globec.whoi.edu/jg/serv/globec/soglobec/inventory.html2%7Bdir=globec.whoi.edu/jg/dir/globec/soglobec/,info=globec.whoi.edu/jg/info/globec/soglobec/inventory%7D?project%20eq%20NBP0104,data_type%20eq%20cruise_report">nbp0104</a>、<a href="http://globec.whoi.edu/so-dir/reports/nbp0202/nbp0202b.html#TOC1_6">nbp0202</a> 及 <a href="http://globec.whoi.edu/so-dir/reports/nbp0204/nbp0204b.html#TOC1_8">nbp0204</a>。</p>

<p><strong>数据贡献者：</strong><br />
玛丽亚·弗内特（Maria Vernet）<br />
综合海洋学分部<br />
斯克里普斯海洋研究所<br />
加利福尼亚大学圣迭戈分校<br />
美国加利福尼亚州拉霍亚市 92093-0218</p>

<p>电话：1-858-534-5322<br />
电子邮箱：<a href="mailto:[e-mail]">[e-mail]</a></p>

<p><em>最后更新：2005年12月9日；gfh</em></p>