How can I identify that a particular day is cloudy or clear sky based on the daily time series of Net Radiation (calculated at FluxNet/AMERIFlux sites)? I read somewhere that clear sky radiation has sinusoidal behavior. If we get different behavior that means it is induced by clouds. I don't know how exactly approach this problem? Here is the sample data: https://drive.google.com/file/d/1f1YfWgPbg3fxhFG1DTNH9Ex3lTDqLBZp/view?usp=sharing
Identification of cloudy days based on Net Radiation data
131 views Asked by raghav At
1
There are 1 answers
Related Questions in R
- new thread blocks main thread
- Extracting viewCount & SubscriberCount from YouTube API V3 for a given channel, where channelID does not equal userID
- Display images on Django Template Site
- Difference between list() and dict() with generators
- How can I serialize a numpy array while preserving matrix dimensions?
- Protractor did not run properly when using browser.wait, msg: "Wait timed out after XXXms"
- Why is my program adding int as string (4+7 = 47)?
- store numpy array in mysql
- how to omit the less frequent words from a dictionary in python?
- Update a text file with ( new words+ \n ) after the words is appended into a list
Related Questions in GIS
- new thread blocks main thread
- Extracting viewCount & SubscriberCount from YouTube API V3 for a given channel, where channelID does not equal userID
- Display images on Django Template Site
- Difference between list() and dict() with generators
- How can I serialize a numpy array while preserving matrix dimensions?
- Protractor did not run properly when using browser.wait, msg: "Wait timed out after XXXms"
- Why is my program adding int as string (4+7 = 47)?
- store numpy array in mysql
- how to omit the less frequent words from a dictionary in python?
- Update a text file with ( new words+ \n ) after the words is appended into a list
Related Questions in ATMOSPHERE
- new thread blocks main thread
- Extracting viewCount & SubscriberCount from YouTube API V3 for a given channel, where channelID does not equal userID
- Display images on Django Template Site
- Difference between list() and dict() with generators
- How can I serialize a numpy array while preserving matrix dimensions?
- Protractor did not run properly when using browser.wait, msg: "Wait timed out after XXXms"
- Why is my program adding int as string (4+7 = 47)?
- store numpy array in mysql
- how to omit the less frequent words from a dictionary in python?
- Update a text file with ( new words+ \n ) after the words is appended into a list
Related Questions in SOLAR
- new thread blocks main thread
- Extracting viewCount & SubscriberCount from YouTube API V3 for a given channel, where channelID does not equal userID
- Display images on Django Template Site
- Difference between list() and dict() with generators
- How can I serialize a numpy array while preserving matrix dimensions?
- Protractor did not run properly when using browser.wait, msg: "Wait timed out after XXXms"
- Why is my program adding int as string (4+7 = 47)?
- store numpy array in mysql
- how to omit the less frequent words from a dictionary in python?
- Update a text file with ( new words+ \n ) after the words is appended into a list
Popular Questions
- How do I undo the most recent local commits in Git?
- How can I remove a specific item from an array in JavaScript?
- How do I delete a Git branch locally and remotely?
- Find all files containing a specific text (string) on Linux?
- How do I revert a Git repository to a previous commit?
- How do I create an HTML button that acts like a link?
- How do I check out a remote Git branch?
- How do I force "git pull" to overwrite local files?
- How do I list all files of a directory?
- How to check whether a string contains a substring in JavaScript?
- How do I redirect to another webpage?
- How can I iterate over rows in a Pandas DataFrame?
- How do I convert a String to an int in Java?
- Does Python have a string 'contains' substring method?
- How do I check if a string contains a specific word?
Popular Tags
Trending Questions
- UIImageView Frame Doesn't Reflect Constraints
- Is it possible to use adb commands to click on a view by finding its ID?
- How to create a new web character symbol recognizable by html/javascript?
- Why isn't my CSS3 animation smooth in Google Chrome (but very smooth on other browsers)?
- Heap Gives Page Fault
- Connect ffmpeg to Visual Studio 2008
- Both Object- and ValueAnimator jumps when Duration is set above API LvL 24
- How to avoid default initialization of objects in std::vector?
- second argument of the command line arguments in a format other than char** argv or char* argv[]
- How to improve efficiency of algorithm which generates next lexicographic permutation?
- Navigating to the another actvity app getting crash in android
- How to read the particular message format in android and store in sqlite database?
- Resetting inventory status after order is cancelled
- Efficiently compute powers of X in SSE/AVX
- Insert into an external database using ajax and php : POST 500 (Internal Server Error)
If we take your raw data and convert the
Time
column from text into actual dates we can work with, this will help the analysis. We will also remove the rows withNaN
values:If we plot the daily net radiation we see a clear seasonal pattern:
We could use a seasonal decomposition to see these seasonal effects and even remove them:
We can see that as well as the seasonal variation, there is a background trend and considerable random variation within each season. We can also see that the variance appears to be higher in summer than in winter (which makes sense)
Without a clear cut-off to define what "cloudy" means in terms of the net radiation, we can simply specify that we want to identify days when the solar radiation was below average after accounting for time of year and trend over time. So we can do:
This allows us to plot the data showing the days that were unseasonably bright in yellow, and those that were unseasonably dim in gray:
This gives us a rough approximation to your answer that will have to suffice until you work out a good definition of "cloudy"