MOCHA Datasets

mocha_mht_data_ERA5_v2020.nc

Dataset Overview

  • Project: RAPID-MOCHA

  • Description: No description available

  • DOI: https://doi.org/10.17604/3nfq-va20

  • Source File: mocha_mht_data_ERA5_v2020.nc

  • Data Product: MOCHA heat transport at 26.5°N

  • License: ODC-BY

  • Date Created: 2023-08-26T00:14:33Z

  • Time Coverage: 2004-04-02 to 2020-12-14

  • Record Length: 12,202 observations (16.7 years)

  • Sampling Frequency: 12H

Citation:

Johns, W. E., Elipot, S., Smeed, D. A., Moat, B., King, B., Volkov, D. L., Smith, R. H. 2023. Towards two decades of Atlantic Ocean mass and heat transport at 26.5° N. Phil. Trans. R. Soc. A 381: 20220188. https://doi.org/10.1098/rsta.2022.0188

Acknowledgement:

Funding source: the US National Science Foundation.

Dataset Visualization

AMOC time series plot

Time series plot for MOCHA dataset.

Dataset Statistics

  • Total Variables: 20

  • Total Coordinates: 2

  • Dataset Size: 115.63 MB

Coordinate Information

The following table shows information about the dataset coordinates in the standardised version, including coordinate name remapping from the original, if any:

Coordinate

Description

Units

Size

Min Value

Max Value

Missing %

z → DEPTH

Depth: Depth below surface of the water

m

(307,)

0.00

5995.07

0.0%

time → TIME

Time: time array that corresponds to the profile variables

datetime64[ns]

(12202,)

2004-04-02

2020-12-14

0.0%

Variable Information

The following table shows the mapping from original variable names to standardized names, along with key statistics for each variable.

Variable

Description

Units

Size

Min Value

Max Value

Missing %

Q_sum → MHT

MHT: Net meridional heat transport

PW

(12202,)

-0.64

2.52

0.0%

Q_ek → MHT_EKMAN

MHT_EKMAN: Ekman heat transports

PW

(12202,)

-1.16

1.74

0.0%

Q_fc → MHT_FC

MHT_FC: Florida Straits heat transports

PW

(12202,)

1.50

3.29

0.0%

Q_gyre → MHT_GYRE

MHT_GYRE: Basinwide gyre heat transports, as classically defined (e.g. see Johns et al., 2011)

PW

(12202,)

-0.03

0.23

0.0%

Q_int → MHT_INT

MHT_INT: Heat transport for the rest of the interior to Africa (but only represents the contribution by the zonal mean v and T)

PW

(12202,)

-2.97

-0.81

0.0%

Q_mo → MHT_MO

MHT_MO: The sum of all the three interior components between the Bahamas and Africa (Q_int + Q_wedge + Q_eddy)

PW

(12202,)

-2.52

-0.92

0.0%

Q_ot → MHT_OT

MHT_OT: Basinwide overturning heat transports, as classically defined (e.g. see Johns et al., 2011)

PW

(12202,)

-0.63

2.47

0.0%

Q_wedge → MHT_WEDGE

MHT_WEDGE: Heat transport for the “western boundary wedge” off Abaco

PW

(12202,)

-0.41

0.72

0.0%

maxmoc → MOC

MOC_Z: time-varying maximum value of MOC streamfunction

Sverdrup

(12202,)

-5.07

32.90

0.0%

Q_eddy

MHT_EDDY: interior gyre component due to spatially correlated v’T’ variability across the interior, derived from an objective analysis of interior ARGO T/S data merged with the mooring T/S data from moorings, and smoothly merged into the EN4 climatology along 26.5°N below 2000m

PW

(12202,)

-0.03

0.13

0.0%

moc → STREAMFUNCTION_Z

Streamfunction: Streamfunction across the Atlantic at 26.5°N

Sverdrup

(12202, 307)

-18.92

37.79

0.0%

T_basin → TEMP_BASIN

Temperature: time-varying basinwide mean potential temperature profile

degree_C

(12202, 307)

1.50

28.55

0.0%

T_basin_mean → TEMP_BASIN_MEAN

Mean Temperature: time-mean basinwide mean potential temperature profile

degree_C

(307,)

1.51

24.98

0.0%

T_fc_fwt → TEMP_FC_FWT

FC Temperature: time-varying Florida Current flow-weighted potential temperature

degree_C

(12202,)

18.57

20.76

0.0%

V_basin → TRANSPROF_BASIN

Transport per unit depth: time-varying basinwide mean transport profile

Sverdrup/m

(12202, 307)

-0.39

0.56

0.0%

V_basin_mean → TRANSPROF_BASIN_MEAN

Mean Transport per unit depth: time-mean basinwide mean transport profile

Sverdrup/m

(307,)

-0.01

0.10

0.0%

V_fc → TRANSPROF_FC

FC Transport per unit depth: time-varying Florida Current transport profile

Sverdrup/m

(12202, 307)

-0.00

0.15

0.0%

V_fc_mean → TRANSPROF_FC_MEAN

Mean FC Transport per unit depth: time-mean Florida Current transport profile

Sverdrup/m

(307,)

-0.00

0.11

0.0%

trans_ek → TRANS_EKMAN

Ekman: time-varying Ekman transport (calculated from ERA-I winds)

Sverdrup

(12202,)

-12.92

18.16

0.0%

trans_fc → TRANS_FC

FC: time-varying Florida Current transport (from the cable)

Sverdrup

(12202,)

19.17

39.53

0.0%

Metadata (edits applied noted)

The following metadata provides comprehensive information about this dataset: