Questions tagged [data-analysis]
The data-analysis tag has no usage guidance.
37
questions
11
votes
1answer
231 views
Minimum flow duration curves
It is common to prepare flow duration curves from a set of daily river flow data, but does it make sense to build a flow duration curve from a set of monthly minimum flow data? I searched on internet, ...
9
votes
1answer
712 views
NCEP reanalysis model levels
ECMWF Model Levels
The above link describes the coefficients used to define the ECMWF model levels in pressure in order to compute geopotential height. Is there a similar data for NCEP reanalysis ...
8
votes
1answer
162 views
Why are tropical cyclones forming earlier in the North Atlantic basin?
This tweet from Brian McNoldy includes a graph suggesting that tropical cyclones are typically getting named earlier in the year in the Atlantic:
What are the causes for this?
7
votes
1answer
600 views
Computing Isentropic Potential Vorticity from Hybrid Sigma Pressure levels
My task is to compute isentropic potential vorticity on a grid.
All data (ECMWF ens) are given on a hybrid sigma pressure grid.
Since I really cannot find reference, I assume (!) that relative ...
6
votes
1answer
106 views
Kalman - Data assimilation with external model
I'm working with a distributed snow model which simulates Snow Depth and Snow Cover area. It takes in input some atmospherics variables : Temperature / Precipitation / Wind speed ...
I want to ...
6
votes
2answers
287 views
Methods and Software for Interpolating/Modelling of Stratigraphic Well Data in 2D/3D
I have some geologic well data. The lithologies have been interpreted, and stratigraphic columns have been drawn. The columns have been adjusted for elevation, and correlation has been done between ...
6
votes
1answer
109 views
What's the minimum number of days needed for reporting a “monthly average” of daily satellite retrievals?
NASA's Earth Observing System produces many maps of air quality and land-surface variables, from instruments like MODIS, AIRS, OMI, VIIRS, etc. Both NASA and the scientific community produce maps of ...
6
votes
1answer
678 views
How does moveout correction work in seismic reflection profiling?
When you take a seismic reflection profile you take multiple shots and then stack them together around a common midpoint. Due to the extra distance travelled by the wide angle shots there is a moveout ...
5
votes
2answers
246 views
correct way to calculate transport through a section in an ocean numerical model
Suppose that I want to calculate the transport across a certain transect (green line) from the outputs of an ocean numerical model. The model has the $u$ values at the center of the grids (crosses) ...
5
votes
1answer
68 views
Is “seismic energy released” a regionalized variable and can be analyzed using geostatistics?
In geostatistics, we can assess and analyze regionalized variables. Tectonic stresses releases in seismically active regions by occurring earthquakes. We can calculate and estimate the seismic energy ...
4
votes
2answers
1k views
Plotting stereonets in R
Is there a package for R to plot Schmidt nets, like it is done in geology?
So far, I only know software like Stereonet. However I think it would make a lot of sense to handle these data in R, to have ...
4
votes
1answer
907 views
What is the relationship between raw seismic data, CMP Stacking, NMO & Machine Learning
I recently joined a geophysics project to assist with some of their machine learning modeling but am trying to gather the domain knowledge required to participate.
Something I don't quite understand ...
3
votes
2answers
444 views
How to best visualize temperature increase (due to climate change) using GHCN data?
Immediately below is an illustration of my first/prototype attempt to visualize this, which is further explained after that...
What you're looking at is a year-by-year animation of TMAX (daily max ...
3
votes
1answer
71 views
What is the better way to deal the missing and negative cells of satellite snow cover data
Daily and monthly MODIS snow cover L3 data has downloaded, next to deal with missing and negative cells.
Different types of interpolation are being used to fill the missing cells. I want to fill the ...
3
votes
1answer
239 views
Seismogram deconvolution in SAC
Good day! I have a problem replicating a result. Let us consider the top plot here:
On the plot, velocity is in mm/s. I think the problem is to remove instrument response correctly. I downloaded ...
3
votes
1answer
151 views
Best way to interpolate bathymetry with a directional component?
I have a bathymetry dataset that has a small section missing. I need to fill in this section.
The bathymetry in this region has some strongly directional features (e.g. a canyon that runs through the ...
3
votes
1answer
253 views
What statistical methods are best for analyzing long-term rainfall data?
What statistical tools are best analysing rainfall data (overall trends, decadal trends, intensity distribution, extremes, etc.)?
3
votes
1answer
469 views
Accurately Measuring Indoor/Outdoor Air Temperature & Relative Humidity
Iām conducting an independent study as a concerned citizen on the indoor temperature at an animal shelter to support the need of improved air conditioning by documenting how hot it can reach during ...
3
votes
0answers
254 views
What are the advantages of analyzing temperature in Kelvin?
I have air temperature data from reanalysis that I want to analyze. The reanalysis data is in Kelvin, so I'm wondering why they use Kelvin. Is there any advantage or difference in analyzing ...
2
votes
3answers
68 views
stretch phenomena after NMO application on seismic data
after the NMO application we have stretch for far offset , i read a lot of articles but i can't have a complete idea how this phenomena is really created ! any one have a rich explanation ?
2
votes
3answers
200 views
How can I merge weather data from different time zones?
Does anyone know of any simple means for merging (inverse distance weighting method) hourly weather files (precip, temp, etc.) from different time zones?
I am creating weather data for HUC8s, and am ...
2
votes
1answer
76 views
ECMWF vs NOAA forecast data accuracy
I'm a novice software developer who's about to write some Python scripts for getting weather data from several U.S. stations, as well as a few in the Pacific (for checking Southern Oscillation Index &...
2
votes
2answers
77 views
Local Weather Forecast (Self-Learning Algorithm)
First of all, the question! :
Is it possible to predict local weather tendencies for the upcoming hours (let's say 2-3 hours) using only local data?
If yes, which data is needed to make such ...
2
votes
1answer
190 views
Are there resources for determining what percentage of the earth's surface is occupied by air conditioned spaces?
EDIT: My goal with this question was to better understand the impact of cooling systems on local urban environments, but its been pointed out I am asking the incorrect questions for the answer's Im ...
2
votes
1answer
364 views
upper air data(observation) and analysis step for GFS model
Global forecast systems(GFS) gives analysis and forecasts at different time steps. Their main source of input is upper air data which is recorded only twice in a day(observation comes at 00 and 12). ...
2
votes
0answers
63 views
Do any of the ECMWF ensemble forecasts have the associated true values?
I am looking for a dataset of ensemble forecasts and the associated true observed values. For example, a dataset containing $n$ ensemble forecasts of the temperature in 24 hours and the observed ...
2
votes
0answers
64 views
How is tiltmeter data processed?
With what programs can inclinometer data be processed? And how is instrumental correction done?
2
votes
0answers
33 views
Earthquake data acquisition Geosig VE-53
Is it possible to receive data from a Geosig VE-53 to a PCI data acquisition (serial port) connected to PC and without using a recorder?
1
vote
1answer
241 views
SPI (Standardized Precipitation Index) for 40 years seasonal mean
I am working with SPI (Standardized Precipitation Index) and in particular I am interested in obtaining the seasonal mean observation over a period of 40 years.
The meteorological season I am ...
1
vote
0answers
26 views
Complex Empirical Orthogonal Function analysis on Propagating wave
Since Complex EOF (CEOF) is doing hilbert transform before general EOF,
we can get four outputs in each mode.
Magnitude spatial pattern
Magnitude time series
Phase spatial pattern
Phase time series
...
1
vote
0answers
18 views
Get NPK values of soil without spectroscopy
I stumbled upon this new device called Teralytic. Which can measure salination, NPK values and all sorts of things.
Unfortunately it's sold out and I think when it'll be available again rather ...
1
vote
1answer
86 views
Does a climate change big data provider exist? [closed]
Does a big data provider (Like a Bloomberg, which is the world's leading financial data provider) exist which includes ALL the possible informations and parameters about climate change or in general ...
1
vote
0answers
22 views
ALOS Palsar SLC data products for geological mapping
I have some ALOS palsar SLC data products which are downloaded from ESA database and they are processed with ESA ALOS-PALSAR IPF processor which is different from JAXA. Formerly it was not possible to ...
1
vote
0answers
156 views
Issues with projection and fig using python and mpl_toolkits.basemap
I currently have depth data that I am plotting with the code below. The problem that I am having has to do with the figure python is spitting out. The figure is really tiny. I have tried a few things ...
1
vote
0answers
41 views
Should I get my master's in Environmental Science or Environmental Engineering given a Computer Science background? [closed]
I'm currently a Computer Science undergraduate at Georgia Tech. I have ~3.5 GPA, and I want to become a data scientist for the NOAA or a similar organization concerning the acidification of the oceans....
0
votes
1answer
96 views
Decomposition of variables in horizontal and vertical modes
I have a query regarding the practical applicability of variable separable method. Usually we decompose the variables w.r.t components corresponding to different dimensions, this method is used to ...
-1
votes
1answer
44 views
SeaDataNet's NEMO software, stuck on data validation?
I'm new to the community and this is my first question, I would appreciate in advance your patience and your time to read this post.
I'm currently processing some oceanographic data such as salinity, ...
