Although Mauna Loa provides a crucial snapshot, CO₂ levels vary globally—stations in the Southern Hemisphere have yet to reach 430 ppm due to different seasonal cycles. NOAA’s global sampling network ...

An observatory high on Hawaii's Mauna Loa volcano that measures carbon dioxide in the atmosphere has reported its highest ever seasonal peak concentration of the greenhouse gas. For the first time ...

For the first time, the seasonal peak of carbon dioxide concentrations in the atmosphere exceeded 430 parts per million (ppm) at NOAA’s Mauna Loa Observatory on Hawaii, scientists from NOAA and ...

Get Instant Summarized Text (Gist) Atmospheric carbon dioxide at Mauna Loa Observatory surpassed 430 ppm for the first time during its annual peak, with a year-on-year increase of about 3.5–3.6 ppm.

Halting Hawaiian hellfire. Mauna Loa is an infamously hyperactive volcano. In response to its prolific eruptions over the past few centuries, the people of nearby Hilo—current population, about ...

From here, people can look across the caldera, into Halemaʻumaʻu crater, upslope to the summit of Mauna Loa, and watch koaʻe kea (white-tailed tropicbirds) soar above the crater walls. The area was ...