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Kanamitsu, M.; Yulaeva, E.; Li, H.; Hong, S.-Y. | ||||
| Title | Catalina Eddy as revealed by the historical downscaling of reanalysis | Type | $loc['typeJournal Article'] | ||
| Year | 2013 | Publication | Asia-Pacific Journal of Atmospheric Sciences | Abbreviated Journal | Asia-Pacific J Atmos Sci |
| Volume | 49 | Issue | 4 | Pages | 467-481 |
| Keywords | Catalina Eddy; vorticity; diurnal variation; sea breeze | ||||
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| Series Volume | Series Issue | Edition | |||
| ISSN | 1976-7633 | ISBN | Medium | ||
| Area | Expedition | Conference | |||
| Funding | Approved | $loc['no'] | |||
| Call Number | COAPS @ mfield @ | Serial | 194 | ||
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| Author |
Kara, A.B. | ||||
| Title | Mixed layer depth variability over the global ocean | Type | $loc['typeJournal Article'] | ||
| Year | 2003 | Publication | Journal of Geophysical Research | Abbreviated Journal | J. Geophys. Res. |
| Volume | 108 | Issue | C3 | Pages | |
| Keywords | mixed layer; isothermal layer; seasonal cycle; temperature; salinity; verification | ||||
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| Series Volume | Series Issue | Edition | |||
| ISSN | 0148-0227 | ISBN | Medium | ||
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| Funding | Approved | $loc['no'] | |||
| Call Number | COAPS @ mfield @ | Serial | 482 | ||
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| Author |
Karmakar, N.; Misra, V. | ||||
| Title | The Relation of Intraseasonal Variations With Local Onset and Demise of the Indian Summer Monsoon | Type | $loc['typeJournal Article'] | ||
| Year | 2019 | Publication | Journal of Geophysical Research: Atmospheres | Abbreviated Journal | J. Geophys. Res. Atmos. |
| Volume | 124 | Issue | 5 | Pages | 2483-2506 |
| Keywords | hydroclimatic, Indian Summer Monsoon, Intraseasonal Oscillations, eastern Indiawestward propagating | ||||
| Abstract | Two of the most important hydroclimatic features of the Indian Summer Monsoon (ISM) rainfall are its onset/demise and Intraseasonal Oscillations (ISOs) manifested by the active‐break cycles. In this study, we aim to understand the quantitative association between these two phenomena. An objective definition of local onset/demise of the ISM based on more than a century‐long India Meteorological Department (IMD) rain‐gauge observation is taken into consideration. Using multichannel singular spectrum analysis (MSSA) we isolate northward propagating low‐ (20–60 days; LF‐ISO) and northwestward propagating high‐ (10–20 days; HF‐ISO) frequency ISOs from the daily ISM rainfall. Our results suggest that a large number of local onset (59%) and demise (62%) events occur during positive developing phases and positive decaying phases of two ISOs, respectively, with phase‐locking between LF‐ISO and HF‐ISO being particularly important. Local onset is largely associated with favorable phases of ISOs across India except for LF‐ISO over eastern India and HF‐ISO over western Ghats and central India (CI). We find that local demise is more coherent with the ISO phases, especially with HF‐ISO across the domain. We performed a case study to understand large‐scale association with the onset of the ISM over CI. In 44 of total 58 cases (1948–2005), when CI onset occurred during favorable LF‐ISO or HF‐ISO phase, they are either linked with a northward propagation of convection from the equator in LF‐ISO timescale (28 cases) or westward propagating structures from the western Pacific in HF‐ISO timescale (27 cases). | ||||
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| ISSN | 2169-897X | ISBN | Medium | ||
| Area | Expedition | Conference | |||
| Funding | Approved | $loc['no'] | |||
| Call Number | COAPS @ user @ | Serial | 1014 | ||
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| Author |
Kelly, T.B.; Goericke, R.; Kahru, M.; Song, H.; Stukel, M.R. | ||||
| Title | CCE II: Spatial and interannual variability in export efficiency and the biological pump in an eastern boundary current upwelling system with substantial lateral advection | Type | $loc['typeJournal Article'] | ||
| Year | 2018 | Publication | Deep Sea Research Part I: Oceanographic Research Papers | Abbreviated Journal | Deep Sea Research Part I: Oceanographic Research Papers |
| Volume | 140 | Issue | Pages | 14-25 | |
| Keywords | CALIFORNIA CURRENT ECOSYSTEM; OCEAN CARBON-CYCLE; COASTAL WATERS; FRONTAL ZONE; TIME-SERIES; FLUX; SINKING; SEA; PACIFIC; ZOOPLANKTON | ||||
| Abstract | Estimating interannual variability in carbon export is a key goal of many marine biogeochemical studies. However, due to variations in export mechanisms between regions, generalized models used to estimate global patterns in export often fail when used for intra-regional analysis. We present here a region-specific model of export production for the California Current Ecosystem (CCE) parameterized using intensive Lagrangian process studies conducted during El Niño-Southern Oscillation (ENSO) warm and neutral phases by the CCE Long-Term Ecological Research (LTER) program. We find that, contrary to expectations from prominent global algorithms, export efficiency (e-ratio = export / primary productivity) is positively correlated with temperature and negatively correlated with net primary productivity (NPP). We attribute these results to the substantial horizontal advection found within the region, and verify this assumption by using a Lagrangian particle tracking model to estimate water mass age. We further suggest that sinking particles in the CCE are comprised of a recently-produced, rapidly-sinking component (likely mesozooplankton fecal pellets) and a longer-lived, slowly-sinking component that is likely advected long distances prior to export. We determine a new algorithm for estimating particle export in the CCE from NPP (Export = 0.08 · NPP + 72 mg C m-2 d-1). We apply this algorithm to a two-decade long time series of NPP in the CCE to estimate spatial and interannual variability across multiple ENSO phases. Reduced export during the warm anomaly of 2014-2015 and El Niño 2015-2016 resulted primarily from decreased export in the coastal upwelling region of the CCE; the oligotrophic offshore region exhibited comparatively low seasonal and interannual variability in flux. The model resolves intra-regional patterns of in situ export measurements, and provides a valuable contrast to global export models. | ||||
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| Series Volume | Series Issue | Edition | |||
| ISSN | 0967-0637 | ISBN | Medium | ||
| Area | Expedition | Conference | |||
| Funding | Approved | $loc['no'] | |||
| Call Number | COAPS @ rl18 @ | Serial | 984 | ||
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| Author |
Kelly, T.B.; Goericke, R.; Kahru, M.; Song, H.; Stukel, M.R. | ||||
| Title | CCE II: Spatial and interannual variability in export efficiency and the biological pump in an eastern boundary current upwelling system with substantial lateral advection | Type | $loc['typeJournal Article'] | ||
| Year | 2018 | Publication | Deep Sea Research Part I: Oceanographic Research Papers | Abbreviated Journal | Deep Sea Research Part I: Oceanographic Research Papers |
| Volume | 140 | Issue | Pages | 14-25 | |
| Keywords | california current ecosystem; coastal waters; flux; frontal zone; ocean carbon-cycle; oceanography; pacific; sea; sinking; time-series; Zooplankton | ||||
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| ISSN | 0967-0637 | ISBN | Medium | ||
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| Funding | Approved | $loc['no'] | |||
| Call Number | COAPS @ user @ | Serial | 1022 | ||
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| Author |
Kent, E.C.; Berry, D.I.; Prytherch, J.; Roberts, J.B. | ||||
| Title | A comparison of global marine surface-specific humidity datasets fromin situobservations and atmospheric reanalysis | Type | $loc['typeJournal Article'] | ||
| Year | 2014 | Publication | International Journal of Climatology | Abbreviated Journal | Int. J. Climatol. |
| Volume | 34 | Issue | 2 | Pages | 355-376 |
| Keywords | marine climatology; atmospheric reanalysis; surface humidity; air� sea interaction; observations; specific humidity | ||||
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| Series Volume | Series Issue | Edition | |||
| ISSN | 0899-8418 | ISBN | Medium | ||
| Area | Expedition | Conference | |||
| Funding | Approved | $loc['no'] | |||
| Call Number | COAPS @ mfield @ | Serial | 164 | ||
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| Author |
Kim, D.; Lee, S.-K.; Lopez, H.; Foltz, G.R.; Misra, V.; Kumar, A. | ||||
| Title | On the Role of Pacific-Atlantic SST Contrast and Associated Caribbean Sea Convection in August-October U.S. Regional Rainfall Variability | Type | $loc['typeJournal Article'] | ||
| Year | 2020 | Publication | Geophysical Research Letters | Abbreviated Journal | Geophys. Res. Lett. |
| Volume | 47 | Issue | 11 | Pages | |
| Keywords | Pacific‐ Atlantic SST interaction; Atlantic Warm pool; Caribbean Sea; U.S. precipitation | ||||
| Abstract | This study investigates the large‐scale atmospheric processes that lead to U.S. precipitation variability in late summer to midfall (August–October; ASO) and shows that the well‐recognized relationship between North Atlantic Subtropical High and U.S. precipitation in peak summer (June–August) significantly weakens in ASO. The working hypothesis derived from our analysis is that in ASO convective activity in the Caribbean Sea, modulated by the tropical Pacific‐Atlantic sea surface temperature (SST) anomaly contrast, directly influences the North American Low‐Level Jet and thus U.S. precipitation east of the Rockies, through a Gill‐type response. This hypothesis derived from observations is strongly supported by a long‐term climate model simulation and by a linear baroclinic atmospheric model with prescribed diabatic forcings in the Caribbean Sea. This study integrates key findings from previous studies and advances a consistent physical rationale that links the Pacific‐Atlantic SST anomaly contrast, Caribbean Sea convective activity, and U.S. rainfall in ASO. | ||||
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| ISSN | 0094-8276 | ISBN | Medium | ||
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| Funding | Approved | $loc['no'] | |||
| Call Number | COAPS @ user @ | Serial | 1110 | ||
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| Author |
Kranz, S.A.; Wang, S.; Kelly, T.B.; Stukel, M.R.; Goericke, R.; Landry, M.R.; Cassar, N. | ||||
| Title | Lagrangian Studies of Marine Production: A Multimethod Assessment of Productivity Relationships in the California Current Ecosystem Upwelling Region | Type | $loc['typeJournal Article'] | ||
| Year | 2020 | Publication | Journal of Geophysical Research: Oceans | Abbreviated Journal | J. Geophys. Res. Oceans |
| Volume | 125 | Issue | 6 | Pages | |
| Keywords | gross primary production; long‐ term ecological research; equilibrium inlet mass spectrometry; carbon export; net community production | ||||
| Abstract | A multimethod process‐oriented investigation of diverse productivity measures in the California Current Ecosystem (CCE) Long‐Term Ecological Research study region, a complex physical environment, is presented. Seven multiday deployments covering a transition region from high to low productivity were conducted over two field expeditions (spring 2016 and summer 2017). Employing a Lagrangian study design, water parcels were followed over several days, comparing 24‐h in situ measurements (14C and 15NO3 ‐uptake, dilution estimates of phytoplankton growth, and microzooplankton grazing) with high‐resolution productivity measurements by fast repetition rate fluorometry (FRRF) and equilibrium inlet mass spectrometry (EIMS), and integrated carbon export measuremnts using sediment traps. Results show the importance of accounting for temporal and fine spatial scale variability when estimating ecosystem production. FRRF and EIMS measurements resolved diel patterns in gross primary and net community production. Diel productivity changes agreed well with comparably more traditional measurements. While differences in productivity metrics calculated over different time intervals were considerable, as those methods rely on different base assumptions, the data can be used to explain ecosystem processes which would otherwise have gone unnoticed. The processes resolved from this method comparison further understanding of temporal and spatial coupling and decoupling of surface productivity and potential carbon burial in a gradient from coastal to offshore ecosystems. | ||||
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| ISSN | 2169-9275 | ISBN | Medium | ||
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| Funding | Approved | $loc['no'] | |||
| Call Number | COAPS @ user @ | Serial | 1113 | ||
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| Author |
Krishnamurthy, V.; Misra, V. | ||||
| Title | Daily atmospheric variability in the South American monsoon system | Type | $loc['typeJournal Article'] | ||
| Year | 2011 | Publication | Climate Dynamics | Abbreviated Journal | Clim Dyn |
| Volume | 37 | Issue | 3-4 | Pages | 803-819 |
| Keywords | South American monsoon; ENSO; Atlantic multidecadal oscillation; Intraseasonal oscillation-MJO; NAO | ||||
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| Series Volume | Series Issue | Edition | |||
| ISSN | 0930-7575 | ISBN | Medium | ||
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| Funding | Approved | $loc['no'] | |||
| Call Number | COAPS @ mfield @ | Serial | 300 | ||
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| Author |
Krishnamurthy, V.; Misra, V. | ||||
| Title | Observed ENSO teleconnections with the South American monsoon system | Type | $loc['typeJournal Article'] | ||
| Year | 2010 | Publication | Atmospheric Science Letters | Abbreviated Journal | Atmos. Sci. Lett. |
| Volume | Issue | Pages | |||
| Keywords | ENSO; South America; monsoon variability; sea surface temperature | ||||
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| ISSN | 1530261X | ISBN | Medium | ||
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| Funding | Approved | $loc['no'] | |||
| Call Number | COAPS @ mfield @ | Serial | 351 | ||
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