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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
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.
0094-8276
Carella, G.
3e1debcd-101d-46b3-99dc-eef476e0b262
Kennedy, J. J.
5cee1dd0-290d-41e5-91a6-5f3ebd3dc5bb
Berry, D. I.
55ffc590-f459-49c8-aecf-842d65aeb0fb
Hirahara, S.
5520d9da-1628-45d5-a192-9ef01b6b7f26
Merchant, C. J.
3a9023d1-a62e-4875-8d67-8fdc8ae0811b
Morak-bozzo, S.
16f66a3b-0ffc-4dbc-b643-23cf8bbf773b
Kent, E. C.
d0bdfe0e-92e4-4184-8a72-bfa87311952a
Carella, G.
3e1debcd-101d-46b3-99dc-eef476e0b262
Kennedy, J. J.
5cee1dd0-290d-41e5-91a6-5f3ebd3dc5bb
Berry, D. I.
55ffc590-f459-49c8-aecf-842d65aeb0fb
Hirahara, S.
5520d9da-1628-45d5-a192-9ef01b6b7f26
Merchant, C. J.
3a9023d1-a62e-4875-8d67-8fdc8ae0811b
Morak-bozzo, S.
16f66a3b-0ffc-4dbc-b643-23cf8bbf773b
Kent, E. C.
d0bdfe0e-92e4-4184-8a72-bfa87311952a

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).

Record type: Article

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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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: https://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: 08 Jun 2018 16:30

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Contributors

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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