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Detalles del recurso

Descripción

Near-shore waters along the northwest African margin are characterized by coastal upwelling and represent one of the world's major upwelling regions. Sea surface temperature (SST) records from Moroccan sediment cores, extending back 2500 years, reveal anomalous and unprecedented cooling during the 20th century, which is consistent with increased upwelling. Upwelling-driven SSTs also vary out of phase with millennial-scale changes in Northern Hemisphere temperature anomalies (NHTAs) and show relatively warm conditions during the Little Ice Age and relatively cool conditions during the Medieval Warm Period. Together, these results suggest that coastal upwelling varies with NHTAs and that upwelling off northwest Africa may continue to intensify as global warming and atmospheric CO2 levels increase.

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PANGAEA - Publishing Network for Geoscientific & Environmental Data  

Autor(es)

McGregor, Helen V -  Dima, Mihai -  Fischer, Helmut W -  Mulitza, Stefan - 

Id.: 51826434

Idioma: inglés  - 

Versión: 1.0

Estado: Final

Tipo:  application/zip, 6 datasets - 

Palabras clave137Cs -  137Cs std dev -  1 sigma -  210Pb -  210Pb std dev -  2 sigma calibrated age range -  Age -  Age, 14C calibrated -  Age, 14C conventional -  Age, 210Pb -  Age, AMS 14C milieu/reservoir corrected -  Age, dated -  Age, dated standard deviation -  Age, maximum/old -  Age, minimum/young -  Age dated -  Age max -  Age min -  Age model -  Age std dev -  Alkenone, unsaturation index UK'37 -  assuming the 1 -  2cm depth interval is equivalent to 1998 -  Caesium 137 -  Caesium 137, standard deviation -  Calculated, see reference(s) -  Calculated from C37 alkenones (McGregor et al., 2007) -  Calculated from C37 alkenones (Prahl & Wakeham, 1987) -  Calculated from UK'37 (Prahl et al., 1988) -  Center for Marine Environmental Sciences -  D depth -  Delta depth -  Depth -  Depth, bottom/max -  DEPTH, sediment/rock -  Depth, top/min -  Depth bot -  Depth shifted -  Depth top -  GeoB6008 -  1 -  2 -  Gravity corer (Kiel type) -  in years prior to the 1 -  2cm depth interval, based on the Constant Rate of Supply -  Lead 210 -  Lead 210, standard deviation -  Leibniz -  Labor Kiel, Germany -  M45/5a -  MARUM -  Mass spectrometer Finnigan MAT 251 -  Meteor (1986) -  MUC -  MultiCorer -  normalized SST -  PACLIVA -  Patterns of Climate Variability in the North Atlantic -  Sample code/label -  Sample label -  Sea surface temperature, annual mean -  Sea surface temperature, normalized -  see comment -  Size fraction 400 -  680 µm. The total error is estimated as ± 0.1 per mil. -  SL -  SST (1 -  12) -  SST nm -  U. mediterranea d13C -  UK'37 -  Unit -  Bq/cm**3 -  Uvigerina mediterranea, d13C - 

Cobertura:  LATITUDE: 30.845000 * LONGITUDE: -10.098300 * DATE/TIME START: 1999-10-18T17:28:00 * DATE/TIME END: 1999-10-18T17:59:00 - 

Tipo de recurso: Dataset  - 

Tipo de Interactividad: Expositivo

Nivel de Interactividad: muy bajo

Audiencia: Estudiante  -  Profesor  -  Autor  - 

Estructura: Atomic

Coste: no

Copyright: sí

: CC-BY: Creative Commons Attribution 3.0 Unported

Formatos:  application/zip, 6 datasets - 

Requerimientos técnicos:  Browser: Any - 

Relación: [IsBasedOn] Supplement to: McGregor, Helen V; Dima, Mihai; Fischer, Helmut W; Mulitza, Stefan (2007): Rapid 20th-Century Increase in Coastal Upwelling off Northwest Africa. Science, 315(5812), 637-639, https://doi.org/10.1126/science.1134839

Fecha de contribución: 29-ago-2017

Contacto:

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