Questions tagged [data-analysis]
The data-analysis tag has no usage guidance.
51
questions
11
votes
1answer
244 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
870 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
183 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
755 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
116 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
317 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
148 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
74 views
Is there a global map of wind design loads or wind gust climatology?
I'm looking for a world map of wind gust climatology data, with the specific purpose of being used for coarse comparison of building design loads, with a consistent metric regardless of location.
...
6
votes
1answer
762 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
380 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
69 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 ...
3
votes
2answers
503 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
72 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
2answers
48 views
Comparing 2D fields - how do you quantify similarity?
I have a number of arrays describing both forecasts and observations of geospatial data (e.g. precipitation intensity, cloud fields...). Included are four animated gifs, each looping back and forth ...
3
votes
1answer
332 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
195 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
293 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
510 views
Accurately Measuring Indoor/Outdoor Air Temperature & Relative Humidity
I’m 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
53 views
Beam forming FK analysis of a seismic wave
So after reading alot of literature on source localization, I found out that FK analysis is one of the most widely used methods to determine source location without explicitly calculating the ...
3
votes
0answers
416 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
91 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
255 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
2answers
99 views
Seeking climate and related sciences textbook recommendations
I will be starting a Master's program in data science soon and my eventual hope/goal is to do climate-related data science work. I did an independent study for one semester in college on the ...
2
votes
1answer
204 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
107 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
2answers
40 views
What is the correct way to report historical daily Max / Min / Avg Temperature by City?
I starting a weather project where I'm using ERA5 hourly dataset (ref: https://cds.climate.copernicus.eu/cdsapp#!/dataset/reanalysis-era5-single-levels?tab=form). Using this dataset in python, I have ...
2
votes
1answer
192 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
54 views
Is there a name for a type of algorithm or processing which uses only one source of data as input?
Many algorithms in remote sensing take one or more different datasets as inputs and return some output. An example might be computing the amount of sulfur dioxide (SO2) injected into the stratosphere ...
2
votes
1answer
381 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
30 views
What is the best way to check for technical validity of climate data?
I processed a lot of modeled climate data from CMIP and I want to check that I have not made any errors. I think the best way to do this is to somehow evaluate the data I produced geographically ...
2
votes
0answers
66 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
70 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
288 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
1answer
238 views
Does the Earth produces measurable gravity waves?
Does the Earth exhibit measurable gravity waves? Note: I'm not asking about gravitational waves.
Some recent experiments looking at low-frequency (3$\times 10^{-5}$Hz) accelerometer data are showing ...
1
vote
0answers
30 views
From ice core analysis to temperature curves
In ice cores a lot of data are measured and analyzed and can be plotted versus depth, for example
age of layers
thickness of layers
concentration of spurious gases
concentration of solids
delta ...
1
vote
1answer
41 views
How do I find the Datum (Diurnal Correction) number for a Magnetometer
I’m a new prospector who was given the task of learning a GEM GSM-19T Proton Magnetometer. I’ve learned how to set it up, take base readings, and take walking surveys. However when setting up a base ...
1
vote
0answers
20 views
Quality control in Seismic Acquisition - shot offset shift
I have a problem with seismic data where the minimum offset of the shot is not centered at the nearest receiver, this shift can be for 3 traces 2 or one and maybe more in the two sides !!
So is there ...
1
vote
0answers
18 views
How to efficiently estimate merchentable volume for timber inventory using species, DBH, and merchentable heights?
I am trying to estimate wood volume for forest stands I have field-inventoried using a variable plot sample method, measuring species, DBH, and height of each tree counted 'in' using a BAF-10 prism. ...
1
vote
0answers
36 views
Broadband Albedo Conversion Scheme
I had this albedo conversion written down:
$$\alpha = 0.53\alpha_{VIS}+0.47\alpha_{NIR}$$
I had on my notes that this equation was form Collins et al (2002).
However, I cannot find where this came ...
1
vote
0answers
25 views
What software libraries, tools or frameworks do you use for turning tabular sensor data from the field into cleaned data files
Cleaning data and turning it into a useable format that can be integrated with other datasets is a time-consuming task that earth scientists face when using sensor data. Most sensors output data in a ...
1
vote
0answers
44 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
19 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
89 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
24 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
164 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
46 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
106 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 ...
0
votes
0answers
45 views
Prevalence of 'well-rounded' beach fabric on the Foreshore
Apologies for the vagueness of this query, but generally, would it be plausible to state that the prevalence of 'sub-rounded'* beach fabric is more common at the foreshore than 'sub-angular'* beach ...
