Pace where the atlantic and pacific meet name

Frontiers | Simulating PACE Global Ocean Radiances | Marine Science

pace where the atlantic and pacific meet name

Officially Cape Agulhas is the place where the Indian and Atlantic Oceans meet, and not . A great break from the frantic pace of the usual sightseeing vacation. Keywords: PACE, ocean color, water-leaving radiances, biogeochemical model, radiative transfer model . Object name is nihmsf1 .. ±10° latitude): North Central Atlantic and Pacific, South Atlantic, Pacific and Indian, .. maximize the ability to meet the challenging goals of this ambitious mission. Guest post: How the Pacific Ocean alters the pace of Arctic warming As its name suggests, fluctuations of the PDO typically occur over.

From chlorophyll interannual variability to inherent optical properties to physical-biological coupling, the time series has been an invaluable resource for scientists in a broad range of ocean and atmosphere-related fields.

Borders of the oceans - Wikipedia

As is often the case in science, the proliferation of information from these moderate resolution missions has raised as many questions as it has answered. Coupled with improvements in detector technology, the time is now right for advancement of ocean biogeochemical science from space using higher spectral resolution missions.

Higher spectral resolution can potentially improve detection of optical constituents in the oceans that have important effects on biology, biogeochemistry, and light transmission. One major objective is the determination of phytoplankton groups from space. Research to detect phytoplankton groups from space has been going on for some time using the fleet of moderate spectral resolution sensors e.

Methods to identify size classes have also been pursued e. Several phytoplankton discrimination methods resolve dominant groups only Sathyendranath et al. Using satellite ocean chlorophyll concentrations rather than radiances, this empirical methodology essentially assumes that abundance reflects taxonomy, which is valid in many instances but not always Rousseaux et al.

Use of hyper-spectral remote retrievals with many bands spanning the visible and ultraviolet spectrum holds potential for resolving these spectral distinctions e.

To close this knowledge gap, NASA has proposed the PACE mission, a global hyper-spectral sensor to test the ability to retrieve phytoplankton population distributions, as well as other important ocean constituents with optical signatures.

The mission, proposed for launch in the early 's, can potentially demonstrate the feasibility and capability of hyper-spectral observations from space and enable scientists to observe and quantify these important ocean biological features. Since there is no global observational precedent, many mission development activities, design tradeoff assessments, operational strategies, and other issues, are speculative.

pace where the atlantic and pacific meet name

Here we develop a dynamic global model at extreme hyper-spectral resolution 1 nm to provide a platform to approximate realistic ocean conditions and help with resolving at least some of these issues and understand if such a simulation can assist in resolving many of the issues that inevitably arise in the design and testing of a new mission. The objective of this effort is to quantitatively assess the skill of a global model using a forward radiance representation to simulate global ocean water-leaving radiances.

The skill is evaluated spectrally with explicit error characterization. Methods to identify size classes have also been pursued e.

pace where the atlantic and pacific meet name

Several phytoplankton discrimination methods resolve dominant groups only Sathyendranath et al. Using satellite ocean chlorophyll concentrations rather than radiances, this empirical methodology essentially assumes that abundance reflects taxonomy, which is valid in many instances but not always Rousseaux et al. Use of hyper-spectral remote retrievals with many bands spanning the visible and ultraviolet spectrum holds potential for resolving these spectral distinctions e.

To close this knowledge gap, NASA has proposed the PACE mission, a global hyper-spectral sensor to test the ability to retrieve phytoplankton population distributions, as well as other important ocean constituents with optical signatures. Since there is no global observational precedent, many mission development activities, design tradeoff assessments, operational strategies, and other issues, are speculative.

Here we develop a dynamic global model at extreme hyper-spectral resolution 1 nm to provide a platform to approximate realistic ocean conditions and help with resolving at least some of these issues and understand if such a simulation can assist in resolving many of the issues that inevitably arise in the design and testing of a new mission. The objective of this effort is to quantitatively assess the skill of a global model using a forward radiance representation to simulate global ocean water-leaving radiances.

pace where the atlantic and pacific meet name

The skill is evaluated spectrally with explicit error characterization. NOBM incorporates global coupled physical-biological processes, including four phytoplankton groups diatoms, chlorophytes, cyanobacteria, and coccolithophoreswhich span much of the functionality of the global oceans, four nutrients nitrate, ammonium, silicate, and dissolved ironthree detrital components particulate organic carbon, silicate, and ironand two carbon components dissolved organic and inorganic carbon.

Simulating PACE Global Ocean Radiances

Optically-active constituents have been added to NOBM to improve realism and complexity of the ocean simulation and better represent the ocean optical variability that will be observed by PACE. PIC is produced by coccolithophores as detached coccoliths and is lost via sinking and dissolution. The PIC sinking rate is represented here as an exponential function of concentration, assuming that large concentrations of PIC are associated with larger coccolith size.

Dissolution follows Buitenhuis et al. It is additionally destroyed by the absorption of spectral irradiance. The atmosphere and ocean portions of the downwelling and upwelling irradiance are implemented at nm spectral resolution.

Simulating PACE Global Ocean Radiances

Higher spectral resolution is impractical for global models that integrate at 30 min time steps in our case. Upwelling radiance is produced at 1 nm resolution, however.

Biases and uncertainties in the atmospheric component of OASIM have been characterized for clear sky high spectral resolution 1 nm; Gregg and Carder, and under mixed cloudy and clear skies for integrated spectral resolution Gregg and Casey, We elaborate here on the ocean optical calculations.

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