| 27708 |
Creator |
169f034520be3a0d0aff86e4441f6f0e |
| 27708 |
Creator |
f0065c1ec7d49eb264923727f8e1b946 |
| 27708 |
Creator |
ext-83e30ce27f232ce7ca15400cb382dd3c |
| 27708 |
Creator |
ext-a152fa3343969854e257b1f0501be775 |
| 27708 |
Creator |
ext-864b5f911fdc723210c14ba754957bf6 |
| 27708 |
Creator |
ext-d59f5ba47a1cc9ea278b534846a3c66f |
| 27708 |
Creator |
ext-27c323da737b4ed2de033210baf3a6ca |
| 27708 |
Creator |
ext-90aa53dc92d9b40f2cf1bf072e30b530 |
| 27708 |
Creator |
ext-960cedbd38f68cfec30f3d5f57f55439 |
| 27708 |
Creator |
ext-f74d6f278cf1cc818c0812bccd6f0c44 |
| 27708 |
Date |
2010-09 |
| 27708 |
Is Part Of |
repository |
| 27708 |
Is Part Of |
p14770911 |
| 27708 |
abstract |
An annually laminated, uranium-series dated, Holocene stalagmite from southeast Ethiopia
has been analysed for growth rate and δ<sup>13</sup>C and δ<sup>18</sup>O variations
at annual to biennial resolution, in order to provide the first long duration proxy
record of decadal-scale rainfall variability in this climatically sensitive region.
Our study site (10°N) is climatically influenced by both summer (June—August) and
spring (March—May) rainfall caused by the annual movement of the Inter-Tropical Convergence
Zone (ITCZ) and modulated by large-scale anomalies in the atmospheric circulation
and in ocean temperatures. Here we show that stalagmite growth, episodic throughout
the last 7800 years, demonstrates decadal-scale (8—25 yr) variability in both growth
rate and δ<sup> 18</sup>O. A hydrological model was employed and indicates that this
decadal variability is due to variations in the relative amounts of rainfall in the
two rain seasons. Our record, unique in its combination of length (a total of ~1000
years), annual chronology and high resolution δ<sup>18</sup>O, shows for the first
time that such decadal-scale variability in rainfall in this region has occurred through
the Holocene, which implies persistent decadal-scale variability for the large-scale
atmospheric and oceanic driving factors. |
| 27708 |
authorList |
authors |
| 27708 |
issue |
6 |
| 27708 |
status |
peerReviewed |
| 27708 |
uri |
http://data.open.ac.uk/oro/document/24237 |
| 27708 |
uri |
http://data.open.ac.uk/oro/document/24238 |
| 27708 |
uri |
http://data.open.ac.uk/oro/document/24239 |
| 27708 |
uri |
http://data.open.ac.uk/oro/document/24470 |
| 27708 |
volume |
20 |
| 27708 |
type |
AcademicArticle |
| 27708 |
type |
Article |
| 27708 |
label |
Baker, Andy; Asrat, Asfawossen; Fairchild, Ian J.; Leng, Melanie J.; Thomas, Louise
; Widmann, Martin; Jex, Catherine N.; Dong, Buwen; van Calsteren, Peter and Bryant,
Charlotte (2010). Decadal-scale rainfall variability in Ethiopia recorded in an annually
laminated, Holocene-age, stalagmite. The Holocene, 20(6) pp. 827–836. |
| 27708 |
label |
Baker, Andy; Asrat, Asfawossen; Fairchild, Ian J.; Leng, Melanie J.; Thomas, Louise
; Widmann, Martin; Jex, Catherine N.; Dong, Buwen; van Calsteren, Peter and Bryant,
Charlotte (2010). Decadal-scale rainfall variability in Ethiopia recorded in an annually
laminated, Holocene-age, stalagmite. The Holocene, 20(6) pp. 827–836. |
| 27708 |
Title |
Decadal-scale rainfall variability in Ethiopia recorded in an annually laminated,
Holocene-age, stalagmite |
| 27708 |
in dataset |
oro |