5:15 PM - 7:15 PM
[AOS18-P01] Temporal variations of global ocean heat content in each density layer.
Keywords:MOAA GPV, ocean heat content, isopycnal layer
In recent decades, climate change, particularly global warming, has emerged as a critical environmental concern. While the focus has traditionally been on rising land temperatures, attention has increasingly shifted to ocean warming, notably manifested through marine heat waves affecting sea surface temperatures. The IPCC Sixth Assessment Report revealed that oceans have absorbed approximately 90% of Earth's increased energy between 1971 and 2018, establishing ocean heat content as a crucial indicator for monitoring global warming progression.
This study employs the MOAA GPV ocean temperature and salinity gridded dataset (Hosoda et al.,2008) to analyze the temporal variations in heat energy stored within oceanic isopycnal layers. Our objective is to identify temporal and spatial patterns of heat content changes and characterize ocean warming through observational data. We calculated global ocean heat content by establishing isopycnal layers of ±0.05σθ centered on specific density surfaces ranging from 21.0 to 27.8σθ .
Our findings indicate strong correlations in heat content time series between adjacent isopycnal layers within three distinct density ranges: 21.75 – 23.15σθ , 24.15 – 25.15σθ , and 25.45 – 26.25σθ . Notably, the 25.45 – 26.25σθ range exhibited approximately 10% increase in heat content from 2011 to 2018.
In the upcoming lecture, we will present detailed analyses of heat content temporal variations within these correlated isopycnal layers, exploring the geographical regions involved and potential underlying mechanisms driving these patterns.
This study employs the MOAA GPV ocean temperature and salinity gridded dataset (Hosoda et al.,2008) to analyze the temporal variations in heat energy stored within oceanic isopycnal layers. Our objective is to identify temporal and spatial patterns of heat content changes and characterize ocean warming through observational data. We calculated global ocean heat content by establishing isopycnal layers of ±0.05σθ centered on specific density surfaces ranging from 21.0 to 27.8σθ .
Our findings indicate strong correlations in heat content time series between adjacent isopycnal layers within three distinct density ranges: 21.75 – 23.15σθ , 24.15 – 25.15σθ , and 25.45 – 26.25σθ . Notably, the 25.45 – 26.25σθ range exhibited approximately 10% increase in heat content from 2011 to 2018.
In the upcoming lecture, we will present detailed analyses of heat content temporal variations within these correlated isopycnal layers, exploring the geographical regions involved and potential underlying mechanisms driving these patterns.