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Datasets/MODISA_L3M_CHL
d041·dataset

Two decades of ocean-plant color

MODIS Aqua Chlorophyll-a L3 Mapped
OB.DAAC MODISA_L3M_CHL cloud-native 4 km daily / 8-day / monthly composites NetCDF oceanbiologyclimate

Long-term MODIS Aqua chlorophyll-a record (2002+). The continuity record PACE inherits but doesn't replace.

MODIS Aqua Chlorophyll-a L3 Mapped

Long-term MODIS Aqua chlorophyll-a record (2002+). The continuity record PACE inherits but doesn’t replace.

Access

Gotchas

  • Reprocessing R2022 and R2018 differ; use latest R2022.0 by default
  • MODIS Aqua ends ~2027-28; transition to PACE for continuity
  • Other datasets: d040

Sources

The access details, code, and sources below are kept in the original English for technical accuracy.

Quick access (cloud-direct)

modisa_l3m_chl_access.py
import earthaccess
earthaccess.login(strategy="netrc")

results = earthaccess.search_data(
    short_name="MODISA_L3m_CHL",
    bounding_box=(-122.5, 37.2, -121.8, 37.9),
    temporal=("2024-01-01", "2024-12-31"),
)
files = earthaccess.open(results)   # stream from OB.DAAC
Browsing CMR needs no login. Downloading or streaming bytes needs a free Earthdata Login + the earthaccess package.

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