Estimating sea surface temperature measurement methods using characteristic differences in the diurnal cycle: New estimates of SST measurement methods
Estimating sea surface temperature measurement methods using characteristic differences in the diurnal cycle: New estimates of SST measurement methods
Lack of reliable observational metadata represents a key barrier to understanding sea surface temperature (SST) measurement biases, a large contributor to uncertainty in the global surface record. We present a method to identify SST measurement practice by comparing the observed SST diurnal cycle from individual ships with a reference from drifting buoys under similar conditions of wind and solar radiation. Compared to existing estimates, we found a larger number of engine room-intake (ERI) reports post–World War II and in the period 1960–1980. Differences in the inferred mixture of observations lead to a systematic warmer shift of the bias adjusted SST anomalies from 1980 compared to previous estimates, while reducing the ensemble spread. Changes in mean field differences between bucket and ERI SST anomalies in the Northern Hemisphere over the period 1955–1995 could be as large as 0.5°C and are not well reproduced by current bias adjustment models.
Carella, G.
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Kennedy, J. J.
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Berry, D. I.
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Hirahara, S.
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Merchant, C. J.
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Morak-bozzo, S.
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Kent, E. C.
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Carella, G.
3e1debcd-101d-46b3-99dc-eef476e0b262
Kennedy, J. J.
5cee1dd0-290d-41e5-91a6-5f3ebd3dc5bb
Berry, D. I.
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Hirahara, S.
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Merchant, C. J.
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Morak-bozzo, S.
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Kent, E. C.
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Carella, G., Kennedy, J. J., Berry, D. I., Hirahara, S., Merchant, C. J., Morak-bozzo, S. and Kent, E. C.
(2018)
Estimating sea surface temperature measurement methods using characteristic differences in the diurnal cycle: New estimates of SST measurement methods.
Geophysical Research Letters.
(doi:10.1002/2017GL076475).
Abstract
Lack of reliable observational metadata represents a key barrier to understanding sea surface temperature (SST) measurement biases, a large contributor to uncertainty in the global surface record. We present a method to identify SST measurement practice by comparing the observed SST diurnal cycle from individual ships with a reference from drifting buoys under similar conditions of wind and solar radiation. Compared to existing estimates, we found a larger number of engine room-intake (ERI) reports post–World War II and in the period 1960–1980. Differences in the inferred mixture of observations lead to a systematic warmer shift of the bias adjusted SST anomalies from 1980 compared to previous estimates, while reducing the ensemble spread. Changes in mean field differences between bucket and ERI SST anomalies in the Northern Hemisphere over the period 1955–1995 could be as large as 0.5°C and are not well reproduced by current bias adjustment models.
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Carella_et_al-2018-Geophysical_Research_Letters
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Accepted/In Press date: 15 December 2017
e-pub ahead of print date: 12 January 2018
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Local EPrints ID: 416861
URI: http://eprints.soton.ac.uk/id/eprint/416861
ISSN: 0094-8276
PURE UUID: 62bac0d6-821f-4c16-95e2-a85a423ff5dd
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Date deposited: 12 Jan 2018 17:30
Last modified: 15 Mar 2024 17:56
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Author:
G. Carella
Author:
J. J. Kennedy
Author:
D. I. Berry
Author:
S. Hirahara
Author:
C. J. Merchant
Author:
S. Morak-bozzo
Author:
E. C. Kent
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