Seasonal variations in the aragonite saturation state in the upper open-ocean waters of the North Pacific Ocean

A paper supported by CPO's Climate Observation Division (COD) was published in Geophysical Research Letters. The paper--Seasonal variations in the aragonite saturation state in the upper open-ocean waters of the North Pacific Ocean--was published online on June 16, 2015 .

The authors assessed seasonal variations in aragonite saturation state (a widely used metric in assessing the potential risks of ocean acidification) in the upper North Pacific Ocean.

Abstract:

Seasonal variability of the aragonite saturation state (AR) in the upper (50 m and 100 m depths) North Pacific Ocean (NPO) was investigated using multiple linear regression (MLR). The MLR algorithm derived from a high-quality carbon dataset accurately predicted the AR of evaluation datasets (three time-series stations and P02 section) with acceptable uncertainty <0.1 AR). The algorithm was combined with seasonal climatology data, and the estimated AR varied in the range of 0.4–0.6 in the mid-latitude western NPO, with the largest variation found for the tropical eastern NPO. These marked variations were largely controlled by seasonal changes in vertical mixing and thermocline depth, both of which determine the degree of entrainment of CO2-rich corrosive waters from deeper depths. Our MLR-based subsurface AR climatology is complementary to surface climatology based on pCO2 measurements.

To access the paper, visit: onlinelibrary.wiley.com/doi/10.1002/2015GL063602/full

Print

x

ABOUT OUR ORGANIZATION

Americans’ health, security and economic wellbeing are tied to climate and weather. Every day, we see communities grappling with environmental challenges due to unusual or extreme events related to climate and weather. In 2017, the United States experienced a record-tying 16 climate- and weather-related disasters where overall costs reached or exceeded $1 billion. Combined, these events claimed 362 lives, and had significant economic effects on the areas impacted, costing more than $306 billion. Businesses, policy leaders, resource managers and citizens are increasingly asking for information to help them address such challenges.

CONTACT US

Climate Program Office
1315 East-West Hwy, Suite 1100
Silver Spring, MD 20910

CPO.webmaster@noaa.gov