Dataset: 7Be
Deployment: UpRISEE_SPOT_13-14

See complete methodology in Haskell et al. (2016). In summary:
This study is part of an effort aimed at characterizing the biological response to upwelling at SPOT on 21 cruises between January 2013 and June 2014; the Upwelling Regime In-Situ Ecosystem Efficiency (Up.R.I.S.E.E.) study.

Beryllium-7: All methods used in measuring the activity of 7Be and calculating the upwelling velocities presented here are described in Haskell et al. (2015), with three notable exceptions:
1) Due to the continued drought in Southern California, the wet depositional flux of 7Be approached zero toward the end of the 2014 sampling season. Following the logic that the reloading of 7Be associated with aerosols in the atmosphere following each rain event is a function of time between rainfall events (eq. 3c in Haskell et al. (2015)), we increased the maximum reloading rate (rmax) in this equation from 120 to 140 dpm m-2 d-1 for the late May and June 2014 sampling intervals (The wet input flux during this period was ~4% of wet input during this same period in 2013).
2) For October 2013, the upper limit on the measured concentration of 7Be is used in the calculation of upwelling velocity since the measured concentration was 0 +/- 12 dpm m-3.
3) All rainfall rates used in the wet input flux calculation are mean regional rates using the same stations as described in Haskell et al., (2015) with the exception of December 2013, when only one station (Oceanside, CA) was used. The surface currents were dominated by flow from the south prior to the sampling date, according to the JPL Regional Ocean Model (ROMS) output (NASA, 2013). Just as in Haskell et al., (2015), the wet input flux was calculated using the activity measured closest to each rainfall event, until the second half of the spring season (Up18–21) when the seasonal mean was used since there were no measurements of 7Be activity in rain during this period.