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[Notebook] Cloud-Native Analysis of Integrated Vapor Transport and Atmospheric Rivers
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Created: May 18, 2026 at 1:29 p.m. (UTC)
Last updated: Jun 05, 2026 at 5:59 p.m. (UTC)
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Abstract

This resource demonstrates a cloud-native workflow for accessing and analyzing Integrated Vapor Transport (IVT) data stored in HydroShare as a Zarr dataset. The notebook uses HydroShare’s S3-compatible access with xarray and Dask to stream data directly from cloud storage, avoiding the need to download the full dataset locally.

The example focuses on a 1970–2009 subset of CESM2 Large Ensemble historical simulation data near Bodega Bay, California, a region often affected by winter atmospheric rivers. The workflow subsets IVT data in space and time, identifies atmospheric river conditions using an IVT threshold of 250 kg m⁻¹ s⁻¹, assigns atmospheric river categories based on intensity and duration, and calculates an event-integrated IVT metric as a simple measure of event severity. The notebook also produces decadal summaries and maps of atmospheric river category and degree for the selected study area.

Subject Keywords

Coverage

Spatial

Coordinate System/Geographic Projection:
WGS 84 EPSG:4326
Coordinate Units:
Decimal degrees
Longitude
-123.1250°
Latitude
38.0000°

Temporal

Start Date:
End Date:

Content

README.md

Cloud-Native Analysis of Integrated Vapor Transport and Atmospheric Rivers

This HydroShare resource contains a Jupyter Notebook demonstrating a cloud-native workflow for accessing and analyzing Integrated Vapor Transport (IVT) data stored in HydroShare as a Zarr dataset. The notebook uses HydroShare's S3-compatible access with xarray and Dask to stream data directly from cloud storage without downloading the full dataset locally.

The example focuses on CESM2 Large Ensemble historical simulation data near Bodega Bay, California for 1970 through 2009. The workflow subsets IVT data in space and time, identifies atmospheric river conditions using an IVT threshold, assigns atmospheric river categories based on intensity and duration, and summarizes event severity using an event-integrated IVT metric.

The contents in this HydroShare resource are:

  • Access_IVT_and_Explore_AR.ipynb: a Python-based Jupyter Notebook for accessing HydroShare-hosted Zarr data and analyzing IVT and atmospheric river conditions
  • zarr-store.png: Depiction of Zarr storage
  • ARUtils.py: Utility file for processing AR data
  • S3hsclient.py: Utility file for S3 connection with HydroShare

Related Resources

This resource belongs to the following collections:
Title Owners Sharing Status My Permission
CUAHSI Research Notebooks Collection Abner Bogan  Public &  Shareable Open Access
2026 CIROH DevCon Workshop: Essential Geospatial Data and Coding Skills for CIROH Researchers Abner Bogan · Danielle Tijerina-Kreuzer · Irene Garousi-Nejad  Public &  Shareable Open Access
Collection of Materials for the CUAHSI's Workshops at the National Water Center Bootcamp 2026 Irene Garousi-Nejad · Anthony Castronova · Abner Bogan · Danielle Tijerina-Kreuzer  Private &  Shareable None

Credits

Funding Agencies

This resource was created using funding from the following sources:
Agency Name Award Title Award Number
National Oceanic and Atmospheric Administration CIROH: Intelligent Workflows A250364S004

How to Cite

Bogan, A., D. Tijerina-Kreuzer, A. M. Castronova, I. Garousi-Nejad (2026). [Notebook] Cloud-Native Analysis of Integrated Vapor Transport and Atmospheric Rivers, HydroShare, http://www.hydroshare.org/resource/2f988ab840424c80804e5638062a30b6

This resource is shared under the Creative Commons Attribution CC BY.

 http://creativecommons.org/licenses/by/4.0/
CC-BY

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