I have current iWEC2 weather files for over 50 Turkish locations,
but unfortunately none among the "morphed" future year files
(closest would be Cairo, which I would not recommend as a
substitute for Turkish locations).
I don't know of any documentation on the "morphing" technique, but there's no much more to the technique than what I had already written, but if you do a literature search I'm sure you'll find more mention of the technique in other studies.
I wrote my "morphing" program back in 2006 using Fortran mainly
so that I could re-use other routines I have on hand for the
psychrometric calculations. Although the program still worked the
last time I used it last year, it's hardly in a condition that I
would want to share publicly, which was why I recommended you look
into WeatherShift.
If you still have problems with WeatherShift, I could use my
program to generate the future year files for you, but then I
would have to charge you for an hour or two of my time. If
WeatherShift still allows you to upload your weather file in
*.epw and get the future year files for free, it would be cheaper
for you to get the current IWEC2 weather files for Istanbul and
Ankara from my weather web site and then use WeatherShift to
produce the future year files.
You can also send me e-mail if you want to discuss this in more detail.
Joe
Joe Huang White Box Technologies, Inc. 346 Rheem Blvd., Suite 205A Moraga CA 94556 yjhuang@xxxxxxxxxxxxxxxxxxxxxxxx http://weather.whiteboxtechnologies.com for simulation-ready weather data (o) (925)388-0265 (c) (510)928-2683 "building energy simulations at your fingertips"
Joe; thanks for the detailed explanation. I will need weather files for Ankara and Istanbul, Turkey. You probably would have these cities at hand, but if you have any kind of documentation or tools on morphing (excel files or so), I would appreciate if you could share.best.Ipek
On Mon, Mar 20, 2017 at 11:44 AM, Joe Huang YJHuang@xxxxxxxxxxxxxxxxxxxxxxxx [EnergyPlus_Support] <EnergyPlus_Support@xxxxxxxxxxxxxxx> wrote:
You could try WeatherShift developed by Arup Associates in conjunction with someone else whose name I've forgotten.
I believe you must upload your base weather file in epw, and then it will create a future year file for free for you.
You can also purchase "pre-made" future year weather files in epw.
A few technical caveats or explanations:
1. All these weather shifting programs work by "morphing" an existing weather file by changing the monthly averages and daily range predicted by the Global Circulation Models (GCM), i.e., climate change programs, i.e., they assume that the underlying climate patterns do not change but only shift. However, most experts say that Climate Change will likely lead to greater instability in the atmosphere so that extremes will be more intense and longer-lasting. Effects such as these will not be reflected in the "morphing" approach.
2. Since the GCMs operate on a half-degree grid, the changes used in the "morphing" are for a rather large area (50 km x 30 km) that's applied to all weather stations within that grid.
3. Although different GCMs predict similar average trends for the whole planet, they can give very different results for different regions of the globe. That's why WeatherShift uses the results from a collection of CGMs.
4. GCMs all consider a variety of future scenarios, like those used by the IPCC - A1FI, B2, C, D - depending on how society responds to Climate Change, A1FI (Fossil Fuel Intensive) producing the highest impact, and C & D producing the smallest impact due to more use of renewables, etc.
When you get down to it, "morphing" a weather file is not particularly difficult to do, and something I've done for several government-funded projects for the past 12 years. How many locations and what time scale are you thinking? If it's limited to a few large cities and you're satisfied with work done a decade ago, I might be able to dig those out for you.
Joe
Joe Huang White Box Technologies, Inc. 346 Rheem Blvd., Suite 205A Moraga CA 94556 yjhuang@whiteboxtechnologies.com http://weather.whiteboxtechnologies.com for simulation-ready weather data http://www.whiteboxtechnologies.com (o) (925)388-0265 (c) (510)928-2683 "building energy simulations at your fingertips"On 3/19/2017 2:07 PM, Ipek Gursel Dino ipekgursel@xxxxxxxxx [EnergyPlus_Support] wrote:Hi
I am looking for epw weather files for future climates. Univ of Exeter has a tool that can transform an actual year's weather file into epw, but it only works for the U.K. Is there another tool that you know of that can do the same for an arbitrary location?Thanks.İpek--Ipek
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Posted by: Joe Huang <yjhuang@xxxxxxxxxxxxxxxxxxxxxxxx>
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