New orbiter data support an important role for seasonal frost—not liquid water—in the formation of Martian gullies.
seasonal variability
Posted inResearch Spotlights
Going Against the Flow: Documenting Seasonal Current Reversal
Scientists discover the source of a coastal Korean current that reverses its flow in the summer.
Posted inResearch Spotlights
Defining the Onset and End of the Indian Summer Monsoon
A new, objective definition of the onset of the summer monsoon could improve predictions of rainfall in India.
Posted inResearch Spotlights
Improving the Identification of Extreme Precipitation Trends in the U.S.
By greatly reducing the associated uncertainty, a new model is better able to discern statistically significant trends, offering the potential to improve the seasonal forecasting of rare events.
Posted inResearch Spotlights
After a Century, Restored Wetlands May Still Be a Carbon Source
Methane emissions can drastically lower, or even reverse, the benefits of carbon sequestration in restored wetlands, according to new measurements from the Sacramento–San Joaquin Delta.
Posted inResearch Spotlights
Moored Ocean Buoy Tracks Marine Carbon Cycle Variations
Years of data from a North Pacific ocean station show that the ocean's ability to pull carbon out of the atmosphere is controlled by biological and physical processes that change between seasons.
Posted inScience Updates
Predicting Intraseasonal to Seasonal Climate Variation
Tropical Precipitation System Workshop 2015; Yokohama, Japan, 3–4 September 2015
Posted inResearch Spotlights
An Unprecedented View of Biogeochemistry off India's West Coast
Yearlong study reveals seasonal changes in oxygen levels, nutrient availability, and plankton growth.
Posted inResearch Spotlights
Does El Niño Intensity Affect Precipitation in California?
Modeling experiments demonstrate that strong El Niños greatly increase odds for wet winters over California's principal watersheds compared to impacts of weak and moderate El Niños.
Posted inResearch Spotlights
Great Lakes Hold Sway over Water and Carbon Cycling
The largest body of fresh water on Earth governs the exchange of gases between water and the atmosphere that makes it a carbon sink for the entire region.