<div dir="ltr">There are high-resolution <b>free</b> data sources now for MYs (others call them AMYs), including:<div><br></div><div>ERA5-Land from Europe's ECMWF (<a href="https://www.ecmwf.int/en/era5-land">https://www.ecmwf.int/en/era5-land</a>)</div><div>  (Reanalysis data from 1950 to present at 9 km resolution)</div><div><br></div><blockquote style="margin:0 0 0 40px;border:none;padding:0px"><div> If you want ERA5 data in EPW, Oikolab (<a href="https://oikolab.com">https://oikolab.com</a>) provides data for a fee.</div></blockquote><div><br></div><div>NOAA NCEI ISD Integrated Surface Data (<a href="https://www.ncei.noaa.gov/products/land-based-station/integrated-surface-database">https://www.ncei.noaa.gov/products/land-based-station/integrated-surface-database</a>)</div><div>  (Global database of weather station-based data from 1900 to present, replaced soon by GHCN.)</div><div><br></div><div>NOAA NCEI GHCN Global Historical Climate Network (<a href="https://www.ncei.noaa.gov/products/global-historical-climatology-network-hourly">https://www.ncei.noaa.gov/products/global-historical-climatology-network-hourly</a>)</div><div>  (Global database replacing the ISD, more extensive data, fixed format)</div><div><br></div><div>Climate.OneBuilding  (https//:<a href="http://climate.onebuilding.org">climate.onebuilding.org</a>) uses a combination of ISD and ERA5 for its TMYx -- new data through 2023 for more than 20,000 stations globally coming soon.</div><div><br></div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Fri, Jul 26, 2024 at 10:54 AM Chris Yates via Bldg-sim <<a href="mailto:bldg-sim@lists.onebuilding.org">bldg-sim@lists.onebuilding.org</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div class="msg12442320306276642"><div lang="EN-GB" style="overflow-wrap: break-word;"><div class="m_12442320306276642WordSection1"><p class="MsoNormal"><span style="font-size:11pt">Hi Holly,<u></u><u></u></span></p><p class="MsoNormal"><span style="font-size:11pt">That’s an interesting one. Before access to much improved, higher quality AMY data calibration may have been undertaken against TMY or EWY data. If calibrating to monthly energy rather than hourly, presumably date-sensitivity and things like DST are not as big a deal?<u></u><u></u></span></p><p class="MsoNormal"><span style="font-size:11pt">I agree with you that dates are fundamental according the standards.<u></u><u></u></span></p><p class="MsoNormal"><span style="font-size:11pt">Chris<u></u><u></u></span></p><p class="MsoNormal"><span style="font-size:11pt"><u></u> <u></u></span></p><div><div style="border-right:none;border-bottom:none;border-left:none;border-top:1pt solid rgb(225,225,225);padding:3pt 0cm 0cm"><p class="MsoNormal"><b><span lang="EN-US" style="font-size:11pt;font-family:Calibri,sans-serif">From:</span></b><span lang="EN-US" style="font-size:11pt;font-family:Calibri,sans-serif"> Bldg-sim <<a href="mailto:bldg-sim-bounces@lists.onebuilding.org" target="_blank">bldg-sim-bounces@lists.onebuilding.org</a>> <b>On Behalf Of </b>Samuelson, Holly via Bldg-sim<br><b>Sent:</b> Thursday, July 25, 2024 9:48 PM<br><b>To:</b> <a href="mailto:bldg-sim@lists.onebuilding.org" target="_blank">bldg-sim@lists.onebuilding.org</a><br><b>Subject:</b> Re: [Bldg-sim] "Maslow's" hierarchy of calibration<u></u><u></u></span></p></div></div><p class="MsoNormal"><u></u> <u></u></p><div><p class="MsoNormal"><span style="color:black">Chris,<u></u><u></u></span></p></div><div><p class="MsoNormal"><span style="color:black">This might be a no-brainer, but... <u></u><u></u></span></p></div><div><p class="MsoNormal"><span style="color:black">Calibration step one: ensure the weather file used corresponds to the dates of the measured data.<u></u><u></u></span></p></div><div><p class="MsoNormal"><span style="color:black">Best,<u></u><u></u></span></p></div><div><p class="MsoNormal"><span style="color:black">Holly<u></u><u></u></span></p></div><div><p class="MsoNormal"><span style="color:black"><u></u> <u></u></span></p></div><div id="m_12442320306276642Signature"><div id="m_12442320306276642divtagdefaultwrapper"><div><p class="MsoNormal" style="background:white"><span style="font-size:10pt;font-family:Tahoma,sans-serif;color:rgb(136,136,136)"> <u></u><u></u></span></p></div><div><p class="MsoNormal" style="background:white"><span style="font-size:10pt;font-family:Arial,sans-serif;color:rgb(12,136,42)">Holly W. Samuelson | DDes | Registered Architect<u></u><u></u></span></p></div><div><p class="MsoNormal" style="background:white"><span style="font-size:10pt;font-family:Arial,sans-serif;color:rgb(51,51,51)">Associate Professor | Harvard Graduate School of Design<u></u><u></u></span></p></div></div></div></div></div>_______________________________________________<br>
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