1 Descriptive Section

1.1 Indicator category

[1] “Habitat-Physical”

1.2 Indicator name

NE Shelf Annual Sea Surface Temperature (SST)

Includes variable(s): long-term sst

1.3 Indicator brief description

Average annual sea-surface temperatures from the NOAA extended reconstructed sea surface temperature data set (ERSST V5) on the Northeast Continental Shelf.

1.4 Indicator visualization

Since the 1860’s, the Northeast US shelf sea surface temperature (SST) has exhibited an overall warming trend, with the past decade measuring well above the long term average.

2 SMART Attribute Section

2.1 Indicator documentation

2.1.1 Are indicators available for others to use (data downloadable)?

Yes

2.1.1.1 Where can indicators be found?

Data: https://noaa-edab.github.io/ecodata/index.html

Description: https://noaa-edab.github.io/catalog/long_term_sst.html

Technical documentation: https://noaa-edab.github.io/tech-doc/long_term_sst.html

2.1.1.2 How often are they updated? Are future updates likely?

[need sequential look at datasets for update frequency. Future requires judgement]

2.1.1.3 Who is the contact?

Brandon.Beltz@noaa.gov

2.1.2 Gather indicator statistics

2.1.2.1 Units

Indicator	Units
long-term sst	degreesC

2.1.2.2 Length of time series, start and end date, periodicity

General overview: Annual

Indicator specifics:

Indicator	EPU	StartYear	EndYear	NumYears	MissingYears
long-term sst	All	1854	2024	171	0

2.1.2.3 Spatial location, scale and extent

General overview: Full shelf

Indicator specifics:

Indicator	EPU
long-term sst	All

2.1.2.4 Management scale: all species, FMP level, species level, can it be aggregated or separated to different scales?

[Classify by hand, note gridded data if available could be applied to different species ranges]

2.1.2.5 Uncertainty metrics

Uncertainty is captured in these variables:

character(0)

2.1.3 Are methods clearly documented to obtain source data and calculate indicators?

Yes

2.1.3.1 Can the indicator be calculated from current documentation?

R code used in extracting time series of long-term SST data can be found here.

2.1.3.2 Is code publicly available? up to date?

2.1.3.3 Have methods changed over time?

2.1.4 Are indicator underlying source data linked or easy to find?

Source data are available here.

2.1.4.1 Where are source data stored?

This indicator is derived from the NOAA ERSST V5 dataset (Huang et al. 2017b).

2.1.4.2 How/by whom are source data updated? Are future updates likely?

Brandon Beltz, Brandon.Beltz@noaa.gov

[likelihood of source data updates requires judgement, enter by hand]

2.1.4.3 How often are they updated?

[Update by hand, look for source, may require judgement]

2.2 Indicator analysis/testing or history of use

2.2.1 What decision or advice processes are the indicators currently used in?

The data presented here are average annual sea-surface temperatures from the NOAA extended reconstructed sea surface temperature data set (ERSST V5) on the Northeast Continental Shelf.

2.2.2 What implications of the indicators are currently listed?

Long term SST demonstrates that the annual average sea surface temperatures observed during the most recent ten years are well above the historical average dating back to the 1860s.

2.2.3 Do target, limit, or threshold values already exist for the indicator?

2.2.4 Have the indicators been tested to ensure they respond proportionally to a change in the underlying process?

2.2.5 Are the indicators sensitive to a small change in the process, or what is the threshold of change that is detectable?

Unknown

2.2.6 Is there a time lag between the process change and the indicator change? How long?