940 research outputs found
Sustenance of phytoplankton in the subpolar North Atlantic during the winter through patchiness
This study investigates the influence of two factors that change the mixed
layer depth and can potentially contribute to the phytoplankton sustenance over
winter: 1) variability of air-sea fluxes and 2) three-dimensional processes
arising from strong fronts. To study the role of these factors, we perform
several three-dimensional numerical simulations forced with air-sea fluxes at
different temporal averaging frequencies as well as different spatial
resolutions. Results show that in the winter, when the average mixed layer is
much deeper than the euphotic layer and the days are short, phytoplankton
production is relatively insensitive to the high-frequency variability in
air-sea fluxes. The duration of upper ocean stratification due to
high-frequency variability in air-sea fluxes is short and hence has a small
impact on phytoplankton production. On the other hand, slumping of fronts
creates patchy, stratified, shallow regions that persist considerably longer
than stratification caused by changes in air-sea fluxes. Simulations show that
before spring warming, the average MLD with fronts is about 700 m shallower
than the average MLD without fronts. Therefore, fronts increase the residence
time of phytoplankton in the euphotic layer and contribute to phytoplankton
growth. Results show that before the spring warming, the depth-integrated
phytoplankton concentration is about twice as large as phytoplankton
concentration when there are no fronts. Hence, fronts are important for setting
the MLD and sustaining phytoplankton in the winter. Model results also show
that higher numerical resolution leads to stronger restratification, shallower
mixed layers, greater variability in the MLD and higher production of
phytoplankton
PENGARUH KOMITMEN ORGANISASI TERHADAP KINERJA KARYAWAN CONSIGNMENT PADA PT.MATAHARI DEPARTMENT STORE DI PLAZA MULIA SAMARINDA
Organizational commitment are important for companies who want to improve employe performance. PT. Matahari Department Store Plaza Mulia Samarinda is a branch of PT. Matahari Department Store, tbk which is distributedin several parts of Indonesia. PT. Matahari Department Store is a company that’s sells a wide variety of fashion needs ranging from clothing for children to adult, shoes, slippers, beauty products, accessories, children’s toys to household needs. This research aims to determine the influenceof organizational commitment to the consignment employee performance of PT. Matahari Department Store Plaza Mulia in Samarinda. The organizational commitment (X) are used as independent variables while the employee performance as dependent variables. Primary data is obatained by conducting interviewsto 57 respondent using questionnaris. Secondary data is obtained by conducting field observation. Analysis data uses a simple linear regression technique with SPSS 22 software. The result showed that the organizational commitment variables (X) significantly influence to employee performance (Y) PT. Matahari Department Store Plaza Mulia in Samarinda. Suggestions for PT. Matahari Department Store Plaza Mulia in Samarinda the company should build an emotional bond, convince employees to last long in company, make employees aware that leaving the company will harm the employees themselves, pay attention to loyalty outside the working hours that have been given by employees in order to reduce the level of permits or delays
Sinking flux of particulate organic matter in the oceans: Sensitivity to particle characteristics
© The Author(s), 2020. This article is distributed under the terms of the Creative Commons Attribution License. The definitive version was published in Omand, M. M., Govindarajan, R., He, J., & Mahadevan, A. Sinking flux of particulate organic matter in the oceans: Sensitivity to particle characteristics. Scientific Reports, 10(1), (2020): 5582, doi:10.1038/s41598-020-60424-5.The sinking of organic particles produced in the upper sunlit layers of the ocean forms an important limb of the oceanic biological pump, which impacts the sequestration of carbon and resupply of nutrients in the mesopelagic ocean. Particles raining out from the upper ocean undergo remineralization by bacteria colonized on their surface and interior, leading to an attenuation in the sinking flux of organic matter with depth. Here, we formulate a mechanistic model for the depth-dependent, sinking, particulate mass flux constituted by a range of sinking, remineralizing particles. Like previous studies, we find that the model does not achieve the characteristic ‘Martin curve’ flux profile with a single type of particle, but instead requires a distribution of particle sizes and/or properties. We consider various functional forms of remineralization appropriate for solid/compact particles, and aggregates with an anoxic or oxic interior. We explore the sensitivity of the shape of the flux vs. depth profile to the choice of remineralization function, relative particle density, particle size distribution, and water column density stratification, and find that neither a power-law nor exponential function provides a definitively superior fit to the modeled profiles. The profiles are also sensitive to the time history of the particle source. Varying surface particle size distribution (via the slope of the particle number spectrum) over 3 days to represent a transient phytoplankton bloom results in transient subsurface maxima or pulses in the sinking mass flux. This work contributes to a growing body of mechanistic export flux models that offer scope to incorporate underlying dynamical and biological processes into global carbon cycle models.We thank NSF (OCE 1260080), NASA (NNX16AR48G), and the Ministry of Earth Sciences, Government of India (Monsoon Mission Project on the Bay of Bengal) for support. This work was largely done in 2012 while MMO was a postdoctoral associate at WHOI, during a visit by RG supported by The Mary Sears visiting scholar program to the Woods Hole Oceanographic Institution. Thanks also to Benjamin Hodges for many thoughtful contributions
Ayurvedic Concept of Food and Nutrition
Ayurveda places special emphasis on Ahar (diet) and Anna (food) and believes that healthy nutrition nourishes the mind, body and soul. Ayurveda does not discriminate food to be good, or bad, instead it emphasizes various factors that influence food, such as its biological properties, origin, environmental factors, seasons, preparation, freshness, and provides a logical explanation of how to balance food according to one\u27s dosha and physical needs
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