Abstract
Changes in Earths obliquity (tilt of the rotational axis) have a small effect
on incoming solar radiation (insolation) at low latitudes. Yet
many sediment records at low latitudes reveal an obliquity signal. Various
mechanisms have been invoked to explain this signal, such as:
• the remote influence of high-latitude obliquity-driven glacial variability
• obliquity-induced changes in mid- to high-latitude temperature and
humidity, affecting lower latitudes without changes in ice sheets
• obliquity-driven changes in the summer inter-tropical (cross-equatorial)
insolation gradient (SITIG)
Here we use a coupled ocean-atmosphere high resolution global climate
model, EC-Earth, to investigate how tropical climate responds to changes
in obliquity without ice sheets. We focus on the SITIG-mechanism.
on incoming solar radiation (insolation) at low latitudes. Yet
many sediment records at low latitudes reveal an obliquity signal. Various
mechanisms have been invoked to explain this signal, such as:
• the remote influence of high-latitude obliquity-driven glacial variability
• obliquity-induced changes in mid- to high-latitude temperature and
humidity, affecting lower latitudes without changes in ice sheets
• obliquity-driven changes in the summer inter-tropical (cross-equatorial)
insolation gradient (SITIG)
Here we use a coupled ocean-atmosphere high resolution global climate
model, EC-Earth, to investigate how tropical climate responds to changes
in obliquity without ice sheets. We focus on the SITIG-mechanism.
| Original language | English |
|---|---|
| Number of pages | 1 |
| Publication status | Published - Apr 2013 |
| Event | EGU General Assembly 2013 - Vienna, Austria Duration: 7 Apr 2013 → … |
Conference
| Conference | EGU General Assembly 2013 |
|---|---|
| City | Vienna, Austria |
| Period | 7/04/13 → … |
Keywords
- obliquity
- low latitude climate