http://lod.bco-dmo.org/id/dataset/3881
eng; USA
utf8
dataset
Highest level of data collection, from a common set of sensors or instrumentation, usually within the same research project
Biological and Chemical Oceanography Data Management Office (BCO-DMO)
Unavailable
508-289-2009
WHOI MS#36
Woods Hole
MA
02543
USA
info@bco-dmo.org
http://www.bco-dmo.org
Monday - Friday 8:00am - 5:00pm
For questions regarding this resource, please contact BCO-DMO via the email address provided.
pointOfContact
2013-02-28
ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data
ISO 19115-2:2009(E)
One minute cruise tracks from KM0919, KM0920, and KN195-07 in the North Pacific Subtropical Gyre, Hawaiian Islands - Stations Kahe, ALOHA, Kena and WHOTS Mooring in 2009 (Silica Cycling project)
2013-02-28
publication
2013-02-28
revision
BCO-DMO Linked Data URI
2013-02-28
creation
http://lod.bco-dmo.org/id/dataset/3881
Mark A. Brzezinski
University of California-Santa Barbara
principalInvestigator
Biological and Chemical Oceanography Data Management Office (BCO-DMO)
Unavailable
508-289-2009
WHOI MS#36
Woods Hole
MA
02543
USA
info@bco-dmo.org
http://www.bco-dmo.org
Monday - Friday 8:00am - 5:00pm
For questions regarding this resource, please contact BCO-DMO via the email address provided.
publisher
Cite this dataset as: Brzezinski, M. A. (2013) One minute cruise tracks from KM0919, KM0920, and KN195-07 in the North Pacific Subtropical Gyre, Hawaiian Islands - Stations Kahe, ALOHA, Kena and WHOTS Mooring in 2009 (Silica Cycling project). Biological and Chemical Oceanography Data Management Office (BCO-DMO). (Version 28 February 2013) Version Date 2013-02-28 [if applicable, indicate subset used]. http://lod.bco-dmo.org/id/dataset/3881 [access date]
Cruise Tracks - 1min Dataset Description: <p>Cruise Tracks for those Silica Cycling cruises with archived cruise track files at R2R</br>
CruiseId, ISO_DateTime, Lat, Lon, SOG, COG</p> Methods and Sampling: <p>Generated from R2R data files</p>
Funding provided by NSF Division of Ocean Sciences (NSF OCE) Award Number: OCE-0648130 Award URL: http://www.nsf.gov/awardsearch/showAward.do?AwardNumber=0648130
completed
Mark A. Brzezinski
University of California-Santa Barbara
805-893-8605
Marine Science Institute University of California, Santa Barbara
Santa Barbara
CA
93106
USA
mark.brzezinski@lifesci.ucsb.edu
pointOfContact
asNeeded
Dataset Version: 28 February 2013
Unknown
CruiseId
ISO_DateTime_UTC
Latitude
Longitude
SOG
COG
theme
None, User defined
cruise id
ISO_DateTime_UTC
latitude
longitude
Speed over ground
course over ground
featureType
BCO-DMO Standard Parameters
KM0919
KM0920
KN195-07
service
Deployment Activity
North Pacific Subtropical Gyre, 39N 170W
Hawaiian Islands - Stations Kahe, ALOHA, Kena and WHOTS Mooring
place
Locations
otherRestrictions
otherRestrictions
Access Constraints: none. Use Constraints: Please follow guidelines at: http://www.bco-dmo.org/terms-use Distribution liability: Under no circumstances shall BCO-DMO be liable for any direct, incidental, special, consequential, indirect, or punitive damages that result from the use of, or the inability to use, the materials in this data submission. If you are dissatisfied with any materials in this data submission your sole and exclusive remedy is to discontinue use.
Silica Cycling and the Role of Diatoms in the North Pacific Subtropical Gyre
https://www.bco-dmo.org/project/2133
Silica Cycling and the Role of Diatoms in the North Pacific Subtropical Gyre
<p>This study examines the unique silicon cycle of the North Pacific Subtropical Gyre (NPSG).</p>
<p>Most marine silicon cycle studies have focused on the more productive coastal waters or the Southern Ocean where diatoms typically dominate the phytoplankton. Although diatom biomass is much lower in subtropical gyres, silica production is significant in global terms. Silicon cycle studies of the Sargasso Sea in the 1990’s implied that subtropical gyres account for 13% of global marine silica production. More recent data from the NPSG show much higher rates of silica production that would increase the contribution of subtropical gyres to as much as 40%. The new estimate is uncertain and based on few data, but suggests that the contribution of subtropical gyres has been underestimated. Differences in the silicon cycle between the NPSG and the Sargasso Sea go beyond differences in average production rates. The two systems are several months out of phase with each other in terms of their seasonal silica production cycles. Unlike the Sargasso Sea, where diatoms bloom regularly in spring in response to winter convective overturn, permanent stratification prevents spring diatom blooms events in the NPSG, where annual diatom blooms occur in summer, when stratification is strongest and nutrient concentrations are at a seasonal minimum. These enigmatic summer blooms contribute significantly to carbon and nitrogen export in the NPSG and likely dominate the annual silicon cycle.</p>
<p>Time series of rate measurements will be made in collaboration with the HOT program to define the annual silicon cycle at station ALOHA. The project will also collaborate with the new "Center for Microbial Oceanography: Research and Education" (CMORE) Science and Technology Center at the University of Hawaii to study summer blooms. Funding for this portion of the project is from NSF OCE-0648130.</p>
<p>Separately funded laboratory studies (NSF OCE-0726726; Title: Biological characterization of the nitrogen-fixing Rhizosolenia-Richelia symbiosis), looked at the role of diatom-diazotroph associations (DDAs) in elemental cycling in the NPSG.</p>
<p>Nitrogen-fixation provides a key input of new nitrogen into oligotrophic, oceanic regions. Work over the past two decades has highlighted the role of Trichodesmium. More recently, the role of coccoid cyanobacteria as well as symbiotic associations of the filamentous cyanobacteria Richelia intracellularis with species of diatoms (Rhizosolenia and Hemiaulus) has received attention. Little is known of the growth rates, nutrient needs, chemical composition, or environmental tolerances of these DDAs. However, it is clear that DDAs are numerically important in some oceans and can play a major role in mediating new nitrogen inputs. Recent models have identified the need for species-specific parameters, but these are lacking for DDAs. In particular, temperature dependent properties require quantification for application to global warming scenarios.</p>
<p>Laboratory studies of both the Rhizosolenia-Richelia and Hemiaulus-Richelia DDA are now possible due to the reproducible cultivation of this association. This four-year research program will quantify temperature and salinity effects on growth rates and NB2B-fixation rates. It will explore the role of silicate and phosphate (inorganic and organic) in controlling growth rates, chemical composition and NB2B-fixation through host-symbiont interactions. Field studies will address the distribution of both these DDAs and their contribution to Si cycling in large diatom blooms reported from the central N. Pacific gyre.</p>
<p>The mass accumulation of the DDAs in sediment traps as well as in the sedimentary record suggest DDAs are important vectors to depth. The potentially high sinking rates relative to Trichodesmium permit rapid export of new N and sequestration of C. This work will quantify settling rates under conditions of phosphate and silicate-limited growth and provide the first estimates of potential losses due to sinking. This program will provide the first broad characterization of a DDA and provide valuable input data for models.</p>
<p>DDA blooms are potential means to remove C and N quickly from the euphotic zone via mass sedimentation of the diatom host. Diatom remains in sediments suggest this is an important vector for sedimentary deposition. The auteocological work in this study will produce information important for interpreting how such events can occur. In addition, temperature tolerance studies will yield data useful for understanding how this DDA could respond to warming oceans.</p>
<p>The proposed research on Si cycling combined with ongoing studies of C, N and P cycling at station ALOHA will allow, for the first time, an opportunity for a coordinated analysis the cycling of all four of these elements simultaneously in an oligotrophic gyre. The pairing of field work with laboratory studies to determine the role of DDAs will expand understanding of the mechanisms controlling the contribution of diatoms to elemental cycling in open ocean ecosystems.</p>
<p>
<b>RELATED PUBLICATIONS </b></p>
<p>Brzezinski MA, Krause JW, Church MJ, Karl DM, Li B, Jones JL, Updyke B. "The annual silica cycle of the North Pacific subtropical gyre," Deep Sea Research I, v.58, 2011, p. 998.</p>
<p>Duhamel S., Bjorkman K. M., Van Wambeke F., Moutin T., Karl DM. "Characterization of alkaline phosphatase activity in the North and South Pacific Subtropical Gyres: Implications for phosphorus cycling," Limnology and Oceanography, v.56, 2011, p. 1244.</p>
<p>Krause J.W., Brzezinski M.A., Jones J.L. "Application of low-level beta counting of 32Si for the measurement of silica production rates in aquatic environments," Marine Chemistry, v.127, 2011, p. 40.</p>
<p>Krause J.W., Brzezinski M.A., Villareal, T.A., Wilson C. "Increased kinetic efficiency for silicic acid uptake as a driver of summer diatom blooms in the North Pacific subtropical gyre," Limnology and Oceanography, v.57, 2012, p. 1084.</p>
<p>Villareal, T.A.; Adornato, L.; Wilson, C.; Shoenbachler, C.A. "Summer blooms of diatom-diazotroph assemblages (DDAs) and surface chlorophyll in the N. Pacific gyre - a disconnect" Journal of Geophysical Research-Oceans, v.116, 2011, p. DOI: 10.1.</p>
<p>Villareal T.A., Brown, C. G., Brzezinski M.A., Krause J.W., Wilson C.. "Summer Diatom Blooms in the North Pacific Subtropical Gyre: 2008-2009," PLos ONE, v.7, 2012, p. e33109.</p>
<p>Watkins-Brandt K.S., Letelier R.M., Spitz Y.H., Church M.J., Bottjer D., White Angelicque. "Addition of inorganic or organic phosphorus enhances nitrogen and carbon fixation in the oligotrophic North Pacific," Marine Ecology Progress Series, v.432, 2011, p. 17.</p>
Silica Cycling
largerWorkCitation
project
eng; USA
oceans
North Pacific Subtropical Gyre, 39N 170W; Hawaiian Islands - Stations Kahe, ALOHA, Kena and WHOTS Mooring
2013-02-28
North Pacific Subtropical Gyre north of Hawaii, near (30 N, 140 W)
0
BCO-DMO catalogue of parameters from One minute cruise tracks from KM0919, KM0920, and KN195-07 in the North Pacific Subtropical Gyre, Hawaiian Islands - Stations Kahe, ALOHA, Kena and WHOTS Mooring in 2009 (Silica Cycling project)
Biological and Chemical Oceanography Data Management Office (BCO-DMO)
Unavailable
508-289-2009
WHOI MS#36
Woods Hole
MA
02543
USA
info@bco-dmo.org
http://www.bco-dmo.org
Monday - Friday 8:00am - 5:00pm
For questions regarding this resource, please contact BCO-DMO via the email address provided.
pointOfContact
http://lod.bco-dmo.org/id/dataset-parameter/32991.rdf
Name: CruiseId
Units: text
Description: Official UNOLS Cruise Id
http://lod.bco-dmo.org/id/dataset-parameter/32992.rdf
Name: ISO_DateTime_UTC
Units: YYYY-MM-DDTHH:MM:SS.xxxxZ
Description: Date/Time (UTC) ISO formatted
http://lod.bco-dmo.org/id/dataset-parameter/32993.rdf
Name: Latitude
Units: decimal degrees
Description: Latitude Decimal format (South is negative)
http://lod.bco-dmo.org/id/dataset-parameter/32994.rdf
Name: Longitude
Units: decimal degrees
Description: Longitude Decimal format (West is negative)
http://lod.bco-dmo.org/id/dataset-parameter/32995.rdf
Name: SOG
Units: meters/second
Description: Speed Over Ground
http://lod.bco-dmo.org/id/dataset-parameter/32996.rdf
Name: COG
Units: decimal degrees
Description: Course Over Ground (degrees CW from N)
GB/NERC/BODC > British Oceanographic Data Centre, Natural Environment Research Council, United Kingdom
Biological and Chemical Oceanography Data Management Office (BCO-DMO)
Unavailable
508-289-2009
WHOI MS#36
Woods Hole
MA
02543
USA
info@bco-dmo.org
http://www.bco-dmo.org
Monday - Friday 8:00am - 5:00pm
For questions regarding this resource, please contact BCO-DMO via the email address provided.
pointOfContact
2383696
https://datadocs.bco-dmo.org/file/YVVZJ3Zf3x43Ml/CruiseTracks.csv
CruiseTracks.csv
Primary data file for dataset ID 3881
download
https://www.bco-dmo.org/dataset/3881/data/download
download
onLine
dataset
<p>Generated from R2R data files</p>
Specified by the Principal Investigator(s)
<p>Generated from R2R data files</p>
Specified by the Principal Investigator(s)
asNeeded
7.x-1.1
Biological and Chemical Oceanography Data Management Office (BCO-DMO)
Unavailable
508-289-2009
WHOI MS#36
Woods Hole
MA
02543
USA
info@bco-dmo.org
http://www.bco-dmo.org
Monday - Friday 8:00am - 5:00pm
For questions regarding this resource, please contact BCO-DMO via the email address provided.
pointOfContact
Cruise: KM0919
KM0919
R/V Kilo Moana
Community Standard Description
International Council for the Exploration of the Sea
R/V Kilo Moana
vessel
KM0919
Mark A. Brzezinski
University of California-Santa Barbara
Cruise: KM0920
KM0920
R/V Kilo Moana
Community Standard Description
International Council for the Exploration of the Sea
R/V Kilo Moana
vessel
KM0920
Paul J. Lethaby
University of Hawaii
http://hahana.soest.hawaii.edu/hot/cruises.html
Report describing KM0920
Cruise: KN195-07
KN195-07
R/V Knorr
Community Standard Description
International Council for the Exploration of the Sea
R/V Knorr
vessel
KN195-07
Eric M. Grabowski
University of Hawaii
http://hahana.soest.hawaii.edu/hot/cruises.html
Report describing KN195-07
R/V Kilo Moana
Community Standard Description
International Council for the Exploration of the Sea
R/V Kilo Moana
vessel
R/V Knorr
Community Standard Description
International Council for the Exploration of the Sea
R/V Knorr
vessel