Daniel Kamykowski - Academia.edu (original) (raw)
Uploads
Papers by Daniel Kamykowski
Deep Sea Research Part A. Oceanographic Research Papers, 1986
A National Oceanographic Data Center data set comprised of 230,202 oceanographic stations represe... more A National Oceanographic Data Center data set comprised of 230,202 oceanographic stations representing all regions of the world ocean was analyzed statistically for temperature and sigma-; (a,) relationships with nitrate, phosphate or silicic acid concentrations in the upper kilometer of the water column. Six cubic regressions were computed for each 10° square of latitude and longitude containing adequate data. World maps display the locations that allow the prediction of plant nutrient concentrations from temperature or o, within the limits of selected subjective and objective criteria. Geographic coverage improves along the sequence: nitrate, phosphate and silicic acid, and is better for rj, than for temperature. A percentile analysis of the temperature or o, at which less than a selected amount of plant nutrient occurs provided a method to examine incipient nutrient limitation. Contour maps display the approximate temperatures above or ci, values below which nitrate, phosphate or silicic acid routinely approach unmeasurable concentrations in the world ocean as determined by classical plant nutrient analyses. The results summarize the global potential to predict plant nutrient concentrations from remotely sensed temperature or a, and emphasize the latitudinally and longitudinally changing phytoplankton growth environment based on temperature, a, and plant nutrients in present and past oceans.
Deep Sea Research Part A. Oceanographic Research Papers, 1991
As of December 1986. the National Oceanographic Data Center (NODC). Washington. DC. listed 113.80... more As of December 1986. the National Oceanographic Data Center (NODC). Washington. DC. listed 113.800 observations of nitrite concentrations ->0.1 I~M in the world ocean (including adjacent seas). The selected nitrite concentrations range up to 9.4jtM but exhibit a 50th percentile near 0.2 ,aM. The observations are most frequent along the margins of the oceans and c~:cur with decreasing frequency toward the poles. Higher nitrite concentrations are restricted to the upper 50~1 m of the water column, but the different ocean basins exhibit characteristic depth distributions. Some seasonality is discernible in the global and basin-specific nitrite distribution panerns, but possible sampling biases hamper definitive interpretation.
Measurement, Analysis, Simulation, 2003
Canadian Journal of Remote Sensing, 1976
Water colour measurements have been made with a 4-channel spectral-scanning photometer on a 160-m... more Water colour measurements have been made with a 4-channel spectral-scanning photometer on a 160-mile flight line heading 50°S outh of East from Halifax out over the continental shelf. Observations were made in the spectral regions .46-.44ft, .59-.55fj., . 70-.68n and . 75-. 72/u using the four-channel photometer and at .97\i using a silicon photodiode photometer. The spectral data obtained is compared with ship-based chlorophyll measurements made along the same transect.
Deep Sea Research Part A. Oceanographic Research Papers, 1990
As of December 1986, the National Oceanographic Data Center (NODC), Washington, DC, listed over 2... more As of December 1986, the National Oceanographic Data Center (NODC), Washington, DC, listed over 2 million observations of dissolved oxygen concentrations in the world ocean (including adjacent seas) collected between 1905 and 1982. Hypoxia, defined as concentrations below 0.2 ml 1~', accounts for 27,413 of the recorded oxygen observations. The spatial distribution of this NODC-based hypoxia is more extensive than previous compilations suggest. Although the more isolated data points may represent spurious data, the great majority of the observations fall within the ocean regions bounded by contours of oxygen concentrations <1.5mir' or of <20% oxygen saturation in published contour maps of the oxygen minimum surface. In the eastern Pacific, the contour boundary reduces to 0.5 ml P1 or 7.5% saturation. Some seasonally is detected, especially at high latitudes. The depth distribution of hypoxia exhibits a typical marine (s28 ppt) range from near-surface to about 1500 m depth but with occasional occurrences at greater depths; the estuarine (<28 ppt) range extends from near-surface to the bottom of the basin in question.
Deep Sea Research Part A. Oceanographic Research Papers, 1991
... Cells are not oscillating between the sea surface and the bottom of the mixing layer as quick... more ... Cells are not oscillating between the sea surface and the bottom of the mixing layer as quickly as previous authors suggested ... they considered, the photoadaptive characteristics of the phytoplankton clearly are related to the mixing conditions of the water column and increased ...
[
This paper describes the methods used in making a inter-comparison between nutrient availability ... more This paper describes the methods used in making a inter-comparison between nutrient availability inferred from knowledge of the sea surface temperature (SST) and the phytoplankton biomass and productivity in the northern Indian Ocean based on SeaWiFS ocean color observations. In order to do this, a revised set of temperature -nutrient linear regressions for ten degree squares of latitude and longitude .recently were calculated for nitrate (Ni) and phosphate in the Northern Indian Ocean based on hydrographic data obtained from NODC World Ocean Atlas 1994. These relationships support the estimation of nutrient concentration at a geographic location if water temperature is known. In these relationships it is assumed that the intercept of the regression line with y-axis (temperature) is the temperature of the surface waters above which significant concentrations of the nutrient do not remain or the nutrient depletion temperature (NDT). In this analysis, maps of Monthly Sea Surface Temperature (SST) at 54-km resolution were obtained from the AVHRR Oceans Pathfinder project for the Northern Indian Ocean for 1998. These data were thin interpolated to 0.5° x 0.5°~resplution. These temperatures were then compared to the NDT (also interpolated to 0.5° resolution) to identify surface nutrient absence (negative values set to zero) if the SST was higher than the local NDT or surface nutrient concentration if the SST was lower than the local NDT. Sets of SST and the SST-derived nutrient concentrations are compared to maps of SeaWiFS chlorophyll and chlorophyll-derived total (TPP), new (NPP) and regenerated (RPP) primary productivity for the NE and SW monsoons and intermonsoon seasons. The nutrient data show a coherent sequence related to known sources of nutrients in the Northern Indian Ocean including the monsoonal upwelling and the Pacific throughfloW to the Indian Ocean. The two independent satellite data streams suggest relationships between NPP and nitrate and between RPP and phosphate. The NPP-nitrate relationship is improved if a derived nitrate availability index is used.
Deep Sea Research Part A. Oceanographic Research Papers, 1986
A National Oceanographic Data Center data set comprised of 230,202 oceanographic stations represe... more A National Oceanographic Data Center data set comprised of 230,202 oceanographic stations representing all regions of the world ocean was analyzed statistically for temperature and sigma-; (a,) relationships with nitrate, phosphate or silicic acid concentrations in the upper kilometer of the water column. Six cubic regressions were computed for each 10° square of latitude and longitude containing adequate data. World maps display the locations that allow the prediction of plant nutrient concentrations from temperature or o, within the limits of selected subjective and objective criteria. Geographic coverage improves along the sequence: nitrate, phosphate and silicic acid, and is better for rj, than for temperature. A percentile analysis of the temperature or o, at which less than a selected amount of plant nutrient occurs provided a method to examine incipient nutrient limitation. Contour maps display the approximate temperatures above or ci, values below which nitrate, phosphate or silicic acid routinely approach unmeasurable concentrations in the world ocean as determined by classical plant nutrient analyses. The results summarize the global potential to predict plant nutrient concentrations from remotely sensed temperature or a, and emphasize the latitudinally and longitudinally changing phytoplankton growth environment based on temperature, a, and plant nutrients in present and past oceans.
Deep Sea Research Part A. Oceanographic Research Papers, 1991
As of December 1986. the National Oceanographic Data Center (NODC). Washington. DC. listed 113.80... more As of December 1986. the National Oceanographic Data Center (NODC). Washington. DC. listed 113.800 observations of nitrite concentrations ->0.1 I~M in the world ocean (including adjacent seas). The selected nitrite concentrations range up to 9.4jtM but exhibit a 50th percentile near 0.2 ,aM. The observations are most frequent along the margins of the oceans and c~:cur with decreasing frequency toward the poles. Higher nitrite concentrations are restricted to the upper 50~1 m of the water column, but the different ocean basins exhibit characteristic depth distributions. Some seasonality is discernible in the global and basin-specific nitrite distribution panerns, but possible sampling biases hamper definitive interpretation.
Measurement, Analysis, Simulation, 2003
Canadian Journal of Remote Sensing, 1976
Water colour measurements have been made with a 4-channel spectral-scanning photometer on a 160-m... more Water colour measurements have been made with a 4-channel spectral-scanning photometer on a 160-mile flight line heading 50°S outh of East from Halifax out over the continental shelf. Observations were made in the spectral regions .46-.44ft, .59-.55fj., . 70-.68n and . 75-. 72/u using the four-channel photometer and at .97\i using a silicon photodiode photometer. The spectral data obtained is compared with ship-based chlorophyll measurements made along the same transect.
Deep Sea Research Part A. Oceanographic Research Papers, 1990
As of December 1986, the National Oceanographic Data Center (NODC), Washington, DC, listed over 2... more As of December 1986, the National Oceanographic Data Center (NODC), Washington, DC, listed over 2 million observations of dissolved oxygen concentrations in the world ocean (including adjacent seas) collected between 1905 and 1982. Hypoxia, defined as concentrations below 0.2 ml 1~', accounts for 27,413 of the recorded oxygen observations. The spatial distribution of this NODC-based hypoxia is more extensive than previous compilations suggest. Although the more isolated data points may represent spurious data, the great majority of the observations fall within the ocean regions bounded by contours of oxygen concentrations <1.5mir' or of <20% oxygen saturation in published contour maps of the oxygen minimum surface. In the eastern Pacific, the contour boundary reduces to 0.5 ml P1 or 7.5% saturation. Some seasonally is detected, especially at high latitudes. The depth distribution of hypoxia exhibits a typical marine (s28 ppt) range from near-surface to about 1500 m depth but with occasional occurrences at greater depths; the estuarine (<28 ppt) range extends from near-surface to the bottom of the basin in question.
Deep Sea Research Part A. Oceanographic Research Papers, 1991
... Cells are not oscillating between the sea surface and the bottom of the mixing layer as quick... more ... Cells are not oscillating between the sea surface and the bottom of the mixing layer as quickly as previous authors suggested ... they considered, the photoadaptive characteristics of the phytoplankton clearly are related to the mixing conditions of the water column and increased ...
[
This paper describes the methods used in making a inter-comparison between nutrient availability ... more This paper describes the methods used in making a inter-comparison between nutrient availability inferred from knowledge of the sea surface temperature (SST) and the phytoplankton biomass and productivity in the northern Indian Ocean based on SeaWiFS ocean color observations. In order to do this, a revised set of temperature -nutrient linear regressions for ten degree squares of latitude and longitude .recently were calculated for nitrate (Ni) and phosphate in the Northern Indian Ocean based on hydrographic data obtained from NODC World Ocean Atlas 1994. These relationships support the estimation of nutrient concentration at a geographic location if water temperature is known. In these relationships it is assumed that the intercept of the regression line with y-axis (temperature) is the temperature of the surface waters above which significant concentrations of the nutrient do not remain or the nutrient depletion temperature (NDT). In this analysis, maps of Monthly Sea Surface Temperature (SST) at 54-km resolution were obtained from the AVHRR Oceans Pathfinder project for the Northern Indian Ocean for 1998. These data were thin interpolated to 0.5° x 0.5°~resplution. These temperatures were then compared to the NDT (also interpolated to 0.5° resolution) to identify surface nutrient absence (negative values set to zero) if the SST was higher than the local NDT or surface nutrient concentration if the SST was lower than the local NDT. Sets of SST and the SST-derived nutrient concentrations are compared to maps of SeaWiFS chlorophyll and chlorophyll-derived total (TPP), new (NPP) and regenerated (RPP) primary productivity for the NE and SW monsoons and intermonsoon seasons. The nutrient data show a coherent sequence related to known sources of nutrients in the Northern Indian Ocean including the monsoonal upwelling and the Pacific throughfloW to the Indian Ocean. The two independent satellite data streams suggest relationships between NPP and nitrate and between RPP and phosphate. The NPP-nitrate relationship is improved if a derived nitrate availability index is used.