How to plot data from a NetCDF file (NetCDF in Python #02)

In this video, you will learn to quickly and easily make plots of data from a NetCDF file in Python
Chapters
00:00 Introduction
00:12 Installing and importing modules
00:50 1st dataset (1D depth profile)
09:08 2nd dataset (Map)
How to cite this video
If you think this course contributed to the work you are doing, consider citing it in your list of references. Here is a recommended citation:
Marsden, L. (2024, April 19). NetCDF in Python - from beginner to pro. Zenodo. doi.org/10.5281/zenodo.10997447
All videos in this course:
01: • How to open a NetCDF f...
02: • How to plot data from ...
03: • How to write data from...
04: • How to create a NetCDF...
05: • How to structure a dat...
06: • How batch create NetCD...
07: • How to extract data fr...
The code
This tutorial series is accompanied by a Jupyter Book with code, explanations and more examples. You can find the relevant section here:
lhmarsden.github.io/NetCDF_in...
Data used in this tutorial:
Anna Vader, Lucie Goraguer, Luke Marsden (2022) Chlorophyll A and phaeopigments Nansen Legacy cruise 2021708 station P4 (NLEG11) 2021-07-18T08:50:42 doi.org/10.21335/NMDC-1248407...)
OPeNDAP link: opendap1.nodc.no/opendap/chem...
H.-M. Zhang, B. Huang, J. H. Lawrimore, M. J. Menne, and T. M. Smith (2019): NOAA Global Surface Temperature Dataset (NOAAGlobalTemp), Version 5.0. NOAA National Centers for Environmental Information. doi:10.25921/9qth-2p70 Accessed 2024-01-04.
OPeNDAP link: www.ncei.noaa.gov/thredds/dod...
www.ncei.noaa.gov/access/meta...

[@RohanAnand-fy5ic]

hey, what is pressure and depth there, is it a dtype or what?

[@LukeDataManager]

I am not entirely sure what you mean, and pressure is not provided in either of the datasets.
When looking at the variables, you might see for example
CHLOROPHYLL_A_TOTAL (DEPTH) float64 ....
In this example, CHLOROPHYLL_A_TOTAL is the variable name, DEPTH is the name of the dimension, and float64 is the format of the values in the variable.

[@RohanAnand-fy5ic]

@@LukeDataManager ohh..yes I was talking about (DEPTH), and I got it now that the data within the file is organized and indexed along this dimension. Thanks!

[@LukeDataManager]

Glad you solved it!

[@anishratnashakya3964]

The link for global surface temperature is giving an error. Is there a way to download as nc file rather than using URL?

[@LukeDataManager]

Seems to me that NOAA are having some issue with their THREDDS server right now. Try here:
www.ncei.noaa.gov/data/noaa-global-surface-temperature/v6/access/gridded/
And you should be able to download v6 of the data in a NetCDF file

[@anishratnashakya3964]

@@LukeDataManager When I reach this part
'''
desired_date = '2022-12-01'
data_for_desired_date = xrds.sel(time=desired_date)
print(data_for_desired_date)
'''
It gives TypeError: get_loc() got an unexpected keyword argument 'method'
Did I miss to import some libraries?

[@anishratnashakya3964]

It worked in Colab. I might have missed something in local device.