Obliquity signals at low latitudes

Joyce Bosmans; Lucas Lourens; Frits Hilgen

Obliquity signals at low latitudes

Joyce Bosmans
, Lucas Lourens
, Frits Hilgen

Research output: Contribution to conference › Poster › Other research output

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.

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 → …

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

SDG 13 Climate Action

Keywords

obliquity
low latitude climate

Access to Document

ftp://ftp.geog.uu.nl/pub/posters/2013/

Cite this

@conference{db4bfd72bbdc42ad897c7c950bb78765,

title = "Obliquity signals at low latitudes",

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.",

keywords = "obliquity, low latitude climate",

author = "Joyce Bosmans and Lucas Lourens and Frits Hilgen",

year = "2013",

month = apr,

language = "English",

note = "EGU General Assembly 2013 ; Conference date: 07-04-2013",

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TY - CONF

T1 - Obliquity signals at low latitudes

AU - Bosmans, Joyce

AU - Lourens, Lucas

AU - Hilgen, Frits

PY - 2013/4

Y1 - 2013/4

N2 - 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.

AB - 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.

KW - obliquity

KW - low latitude climate

M3 - Poster

T2 - EGU General Assembly 2013

Y2 - 7 April 2013

ER -

Obliquity signals at low latitudes

Abstract

Conference

UN SDGs

Keywords

Access to Document

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Cite this