After a successful mooring recovery cruise in the tropical western North Pacific, a number of MOD scientists used the port stop in Palau to present their research to a number of local visitors. Students from the Palau Community College and the Mindszenty High School visited the ship, as well as David Idip and his team from PALARIS (GIS division of the Palau Government) and the US Ambassador to Palau, Amy Hyatt. The visitors also toured the ship from the bridge down to the engine rooms. We are grateful for Lori Colin from the Coral Reef Research Foundation in Palau for linking us up with all visiting groups.
This video was made when Matthew was at APL/UW, but describes the science and adventure behind the Samoan Passage project pretty well.
July 23, 2019:
Greetings from 16°N 89°E...
Over the last week we have been filling in our map with a ship-based survey, working in the general vicinity of gliders and drifting buoys. Our survey has been oriented across curving AVISO SSH contours associated with a strong eddy to our southwest (see map and WW-buoy time series figs, below). The SVPB drifters that we deployed early in the cruise have fully populated our sampling region. We have been lucky to find ourselves in a region of convergence with strong near-surface fronts. It appears this also a region of biological activity with 10(!) sea turtle sightings and elevated near-surface chlorophyll and backscatter from the FastCTD, all of which lines up well with satellite ocean color images. The general sense is of a productive coastal upwelling jet ejected into the central Bay by the energetic mesoscale. We have collected some beautiful cross-front sections detailing this jet's rapid and complex evolution, as well as several realizations of the ocean’s response to atmospheric cold pools.
The winds have been picking up over the last two days, but we had a few very calm/quiet days over the weekend. There have been a few scattered rain events, typically in the afternoon, but overall the conditions have been clear and sunny. We even had a beautiful view of the recent lunar eclipse (photo courtesy San). Over the next few days we are planning on intensive sampling around buoys 2 and 3. The forecast indicates an increased likelihood of convective activity, but a well-organized miso event that started propagating into the Bay will likely decline before reaching our area.
July 14, 2019:
We have set up on the western side of international waters in a strong eastward flow. The three WHOI-Wirewalker buoys have been out for a few days now. One turbulence glider and one Seaglider have also been deployed in the region while two Spray gliders slowly make their way north. Thirty of the thirty-five drifters are also in the water. We are running a long survey line with the ship on the upstream side of the buoy array. We have been transiting through a region of upper ocean variability (MLD, T/S. Fluorescence) that we think may be related to an offshore filament of upwelled coastal water (based on HYCOM). You can see our general set up in the figure below (courtesy Tom) that shows Aviso SSH and currents, the buoy tracks over the last two days, and the ship track over the last day.
The MOD group has long specialized in Doppler sonar techniques, pioneered over 30 years ago by Rob Pinkel and Jerry Smith. For about 20 years, Scripps’ flagship the R/V Roger Revelle has carried a one-of-a-kind such system, the Hydrographic Doppler Sonar System (HDSS). Unlike conventional Acoustic Doppler Current Profilers carried on most ships, the HDSS has much higher power and much narrower beams, allowing greater precision, finer resolution in the vertical and greater range. While the Revelle is in dry dock for her midlife refit, our group is taking the opportunity to remove the HDSS from her hull, modernize it and reinstall it.
It is a massive job and we have now successfully removed the old system, which requires hard work and long hours beneath the enormous ship. Creating the new system, which will have still higher power and will eventually allow better removal of the ship’s rolling and tilting from the measured signals, has involved long hours by the Marine Physical Laboratory machine shop and painstaking work repotting the transducers and cabling them. The final installation will take place in August.
Wish us luck!
The MOD team’s own Jennifer MacKinnon has been appointed the new Associate Dean of the School of Marine Science for Faculty Equity. In addition, she was recently honoured at the UCSD annual Inclusive Excellence Award along with 13 other individuals at UCSD recognized for their outstanding efforts to celebrate cultural differences and promote fairness across campus. Read more here.
Associate Dean for Faculty Equity is a new academic position at Scripps created with commitment to the UC San Diego Principles of Community, in particular to equitable practices for recruitment, retention and evaluation of faculty. The title is given to the SIO Faculty Equity Advisor (FEA), with hopes of enhancing the ability to recruit and retain excellent faculty and evaluate them in a fair way by having a ladder-rank faculty member specifically tasked with equity concerns in regards to these activities.
The new Associate Dean is not alone in the quest for fairness but will collaborate with the SIO coordinator for Equity, Diversity and Inclusion (EDI) initiatives, and will be backed up by an Alternate FEA that will step in whenever the ocean calls the Associate Dean away on field work.
Professor MacKinnon is currently the Primary FEA, and her position as Associate Dean for Faculty Equity extends until June 2021, but is eligible for renewal.
Way to go Jen!
The Hydrographic Doppler Sonar System (HDSS), is now 20 years old and is getting upgraded when R/V Revelle undergoes her midlife refit this summer and fall. HDSS is a state-of-the-art system for measuring ocean currents. We are substantially upgrading and improving the old system, with enhancements including greater power and real-time beam forming that corrects for the roll and pitch of the ship, improving precision by keeping the beams much more constant orientation.