Registration does not have inbuilt authentication and authorization feature, but relies on Google for site registration. Google only provides us with access to your user name and email id. Once you use your Google credentials to log in, you are afforded access to the web interface where you can request a subset of miroclimate data. To the right of the web interface, you will find a link to a “My Account” page. There you can optionally update your profile. You can also access a secret and key code that can be used to request data via an API.

Data requests and limitations

Data requests can be large due to the hourly time period and fine spatial resolution. Please keep file size in mind when selecting a geographic range. Using the web app, one can either enter coordinates to define a geographic bounding box or click on the rectangle icon to the left of the map. Dragging the rectangle icon around a region will update the coordinates of the bounding box.

We limit data requests to a maximum of 5 years in either the past or present. Please contact us if your application requires access to data for a longer time period. Each data request is for a single, continuous time period with data aggregated at the specified interval (from hourly to monthly).

Using the Web App, click on a variable name to select it (a check mark confirms your selection) and click again to deselect a variable. You then have the option to select a single shade level and height or depth for each request. These selections will be disabled (and shaded) when they are not applicable to your data selection.

Multiple variable selection is permitted through API and Web App. Any selections of shade level or height/depth will be applied only to variables for which they are relevant.

Data are currently available in CSV or netCDF format. Please see the features page for a description of the output format as well as details on available data. Once requests are submitted in the Web App, the status bar at the bottom of the page will report the request status and can be updated using the request button.


We offer API based on rest, which allows you to access our data in any language and from within any environment that support REST API framework. However, we support APIs in R and Python, and details can be found in our respective GitHub repositories:

We provide an example usecase below highlighting the use of our R API toolkit. The available APIs and their parameters are described in detail on the APIs page. When requesting data via the fetch API, one combination of shade level and height/depth is available can be requested. The parameters hod and shadelevel are to be defaulted to '0' when they are NA.


Install/load the required libraries




Key/Secret is found under  My account on the menu. Fetch the token to be used for all interactions using the API key and secret.

                      api_token = getToken('88eb4af7c20dd74742aed57b2c77aff1', '39becfd7fab41b51ea5c55ed0137ec3a',
                      ma <- MicroclimAPI$new(token = api_token,url_mc='')


Prepare Request Parameters

Let us now prepare a sample request to get hourly mean of the following microclimate variables for one year (1981): GLW, SWDOWN, TAH, Tair and Tsurface. We use decimal latitudes and longitudes to specify a bounding box surrounding the Eagle Nest Wilderness Area in Colorado, USA.

                        mr <- microclimRapi:::MicroclimRequest$new(
                              latS = "39.48178546986059",


Place Extraction Request

Place the request

                        ext_req= ma$request(mr)



Once processed, the request transitions to status 'EMAILED', indicating that the files have been emailed to the user and are also available to download via the API. We will now fetch the files into our workspace for processing.

                         for (i in 1:10){
                                print(paste("dowloading file", ftch_req$files[[i]]$Key))
                                ncD <-  ma$download('59134752aa6be7679f737d41',ftch_req$files[[i]]$Key)
                                writeBin(ncD, strsplit(ftch_req$files[[i]]$Key, "/")[[1]][2])