Tidal Characteristic Numbers of Salinity - Revision history

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imported>Lang Guenther: /* Tidal Cycle (between tow subsequent tidal low waters) */ typing error removed

2017-11-23T10:10:27Z

Tidal Cycle (between tow subsequent tidal low waters): typing error removed

← Older revision		Revision as of 10:10, 23 November 2017
Line 216:		Line 216:
	Data analysis: [[NCANALYSE]].		Data analysis: [[NCANALYSE]].

	===Tidal Cycle (between ~~tow~~ subsequent tidal low waters)===		===Tidal Cycle (between two subsequent tidal low waters)===

	====Maximum Salinity====		====Maximum Salinity====

imported>Lang Guenther: /* Definitions for the Tidal Characteristic Numbers of Salinity */ characteristic numbers added for analysis mode TDWS

2017-11-23T10:05:59Z

Definitions for the Tidal Characteristic Numbers of Salinity: characteristic numbers added for analysis mode TDWS

@@ Line 7: / Line 7: @@
 ==Motivation==
 The calculation as well as the graphic visualization of various tidal characteristic numbers of salinity and also for the advective transport of salt contributes to an improved understanding of tidally dominated transport processes in estuaries. Spatial variations of salinity, advective transport of salt by means of [[flood]] and ebb currents can be highlighted for areas like coastal seas and estuaries as well (see also [[Example: Animation of Salinity in the Außenweser Estuary|animation of tidal variability of salinity]] in the Außenweser [[Estuary]]).
-* As the calculations are performed separately for the durations of ebb- and flood-current it can be shown that transport paths can differ significantly for the two tidal phases. From this one can get additional insight with respect to the relevant transport mechanisms dominated by the tidal currents. This can be related to locally varying flood-ebb asymmetries for [[ebb volume]] and [[flood volume]]. Also the presence of horizontal gradients can contribute to this effect.
+* As the calculations are performed separately for the durations of ebb- and [[flood]]-current it can be shown that transport paths can differ significantly for the two tidal phases. From this one can get additional insight with respect to the relevant transport mechanisms dominated by the tidal currents. This can be related to locally varying flood-ebb asymmetries for [[ebb volume]] and [[flood volume]]. Also the presence of horizontal gradients can contribute to this effect.
-* The variation of salinity resulting from the local maximum as well as the local minimum of salinity can be quite large. This is a consequence of fresh water inflow into an estuary. The value for the local salinity variation is mainly the result of the product between the horizontal salinity [[gradient]] and the lagrangian drift of a water particle during a complete tidal cycle. Due to the fact that salt is mainly advectively transported by means of the tidal current. The water particles which are passing at a location during a complete tidal cycle do have different regions of origin. Therefore they can also show substantial differences in salinity because estuaries are regions where fresh and sea water is mixed. For organisms which are living at the seabed and which cannot move the tidal variation of salinity is one of the significant natural stress factors (variation of the osmotic pressure due to salinity variations).
+* The variation of salinity resulting from the local maximum as well as the local minimum of salinity can be quite large. This is a consequence of fresh water inflow into an [[estuary]]. The value for the local salinity variation is mainly the result of the product between the horizontal salinity [[gradient]] and the lagrangian drift of a water particle during a complete tidal cycle. Due to the fact that salt is mainly advectively transported by means of the tidal current. The water particles which are passing at a location during a complete tidal cycle do have different regions of origin. Therefore they can also show substantial differences in salinity because estuaries are regions where fresh and sea water is mixed. For organisms which are living at the seabed and which cannot move the tidal variation of salinity is one of the significant natural stress factors (variation of the osmotic pressure due to salinity variations).
 Multiple characteristic numbers can be computed also for the duration of flood (not duration of flood current) and the duration of ebb (not ebb current).
@@ Line 41: / Line 41: @@
 Not computed by program [[TDKSF]].
 =====Computed from integral (salt) volume transport=====
-Exact volume of salt (with exception of roundoff) which passes a certain cross section during flood current due to (turbulent) diffusion. This quantity makes use of the normal flow of salt only, which is orthogonal to the flow face. Reconstruction of the total vector by means of projection is left to visualization programs (e. g. [[NCPLOT]]). <br />
+Exact volume of salt (with exception of roundoff) which passes a certain cross section during flood current due to (turbulent) diffusion. This quantity makes use of the normal flow of salt only, which is orthogonal to the flow face. Reconstruction of the total vector by means of [[projection]] is left to visualization programs (e. g. [[NCPLOT]]). <br />
 Data analysis: [[NCANALYSE]].
@@ Line 100: / Line 100: @@
 Data analysis: [[NCANALYSE]].
-===Tidal Cycle===
+===Tidal Cycle (between two subsequent ebb slacks)===
 ====Maximum Salinity====
@@ Line 202: / Line 202: @@
 Data analysis: [[NCANALYSE]].
 ----
 back to [[Analysis of Calculated Results]]
 ----
 [[Overview]]

imported>Lang Guenther: remarks on analysis modes TDKS and TDWS

2017-11-23T09:04:11Z

remarks on analysis modes TDKS and TDWS

← Older revision		Revision as of 09:04, 23 November 2017
Line 6:		Line 6:

	==Motivation==		==Motivation==
	The calculation as well as the graphic visualization of various tidal characteristic numbers of salinity and also for the advective transport of salt contributes to an improved understanding of tidally dominated transport processes in estuaries. Spatial variations of salinity, advective transport of salt by means of flood and ebb currents can be highlighted for areas like coastal seas and estuaries as well (see also [[Example: Animation of Salinity in the Außenweser Estuary\|animation of tidal variability of salinity]] in the Außenweser Estuary).		The calculation as well as the graphic visualization of various tidal characteristic numbers of salinity and also for the advective transport of salt contributes to an improved understanding of tidally dominated transport processes in estuaries. Spatial variations of salinity, advective transport of salt by means of [[flood]] and ebb currents can be highlighted for areas like coastal seas and estuaries as well (see also [[Example: Animation of Salinity in the Außenweser Estuary\|animation of tidal variability of salinity]] in the Außenweser [[Estuary]]).
	* As the calculations are performed separately for the durations of ebb- and flood-current it can be shown that transport paths can differ significantly for the two tidal phases. From this one can get additional insight with respect to the relevant transport mechanisms dominated by the tidal currents. This can be related to locally varying flood-ebb asymmetries for ebb volume and flood volume. Also the presence of horizontal gradients can contribute to this effect.		* As the calculations are performed separately for the durations of ebb- and flood-current it can be shown that transport paths can differ significantly for the two tidal phases. From this one can get additional insight with respect to the relevant transport mechanisms dominated by the tidal currents. This can be related to locally varying flood-ebb asymmetries for [[ebb volume]] and [[flood volume]]. Also the presence of horizontal gradients can contribute to this effect.
	* The variation of salinity resulting from the local maximum as well as the local minimum of salinity can be quite large. This is a consequence of fresh water inflow into an estuary. The value for the local salinity variation is mainly the result of the product between the horizontal salinity gradient and the lagrangian drift of a water particle during a complete tidal cycle. Due to the fact that salt is mainly advectively transported by means of the tidal current. The water particles which are passing at a location during a complete tidal cycle do have different regions of origin. Therefore they can also show substantial differences in salinity because estuaries are regions where fresh and sea water is mixed. For organisms which are living at the seabed and which cannot move the tidal variation of salinity is one of the significant natural stress factors (variation of the osmotic pressure due to salinity variations).		* The variation of salinity resulting from the local maximum as well as the local minimum of salinity can be quite large. This is a consequence of fresh water inflow into an estuary. The value for the local salinity variation is mainly the result of the product between the horizontal salinity [[gradient]] and the lagrangian drift of a water particle during a complete tidal cycle. Due to the fact that salt is mainly advectively transported by means of the tidal current. The water particles which are passing at a location during a complete tidal cycle do have different regions of origin. Therefore they can also show substantial differences in salinity because estuaries are regions where fresh and sea water is mixed. For organisms which are living at the seabed and which cannot move the tidal variation of salinity is one of the significant natural stress factors (variation of the osmotic pressure due to salinity variations).

	'''Automatic analyses for all of the above mentioned tidal characteristic numbers of salinity are carried out for 2D- as well as for 3D-data by the programs [[TDKSF]] and [[NCANALYSE]].'''		Multiple characteristic numbers can be computed also for the duration of flood (not duration of flood current) and the duration of ebb (not ebb current).

			'''Automatic analyses for all of the above mentioned tidal characteristic numbers of salinity are carried out for 2D- as well as for 3D-data by the programs [[TDKSF]] and [[NCANALYSE]]''' (modes '''TDKS''' (flood current, ebb current) and '''TDWS''' (flood, ebb)).

			For modes '''TDKS''' and '''TDWS''' the periods of analysis and integration are differently defined:
			* mode '''TDKS'''
			** flood current: period between ebb slack (or start of flooding) and flood slack;
			** ebb current: period between flood slack and ebb slack (or end of flooding);
			** tide: period between first ebb slack (or start of flooding) and second ebb slack (or end of flooding).
			* mode '''TDWS'''
			** flood: period between tidal low water (or start of flooding) and tidal high water;
			** ebb: period between tidal high water and tidal low water (or end of flooding);
			** tide: period between first tidal low water (or start of flooding) and second tidal low water (or end of flooding).

	==Definitions for the Tidal Characteristic Numbers of Salinity==		==Definitions for the Tidal Characteristic Numbers of Salinity==
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	Data analysis: [[TDKSF]].		Data analysis: [[TDKSF]].
	=====Computed from integral (salt) volume transport=====		=====Computed from integral (salt) volume transport=====
	Exact volume of salt (with exception of roundoff) which passes a certain cross section during flood current due to advection. This quantity makes use of the normal flow of salt only, which is orthogonal to the flow face. Reconstruction of the total vector by means of projection is left to visualization programs (e. g. [[NCPLOT]]). <br />		Exact volume of salt (with exception of roundoff) which passes a certain cross section during flood current due to advection. This quantity makes use of the normal flow of salt only, which is orthogonal to the flow face. Reconstruction of the total vector by means of [[projection]] is left to visualization programs (e. g. [[NCPLOT]]). <br />
	Data analysis: [[NCANALYSE]].		Data analysis: [[NCANALYSE]].

imported>Lang Guenther: /* Computed from integral (salt) volume transport */ typing error corrected

2017-02-21T10:25:24Z

Computed from integral (salt) volume transport: typing error corrected

← Older revision		Revision as of 10:25, 21 February 2017
Line 80:		Line 80:
	Not computed by program [[TDKSF]].		Not computed by program [[TDKSF]].
	=====Computed from integral (salt) volume transport=====		=====Computed from integral (salt) volume transport=====
	Exact volume transport rate of salt (with exception of roundoff) which passes a certain cross section during ebb current due to (turbulent) diffusion. This quantity makes use of the normal flow of salt only, which is orthogonal to the flow face. Reconstruction of the total vector by means of projection is left to visualization programs (e. g. [[NCPLOT]]). On tidal flats this ~~quanmtity~~ is computed for the period of inundation only. <br />		Exact volume transport rate of salt (with exception of roundoff) which passes a certain cross section during ebb current due to (turbulent) diffusion. This quantity makes use of the normal flow of salt only, which is orthogonal to the flow face. Reconstruction of the total vector by means of projection is left to visualization programs (e. g. [[NCPLOT]]). On tidal flats this quantity is computed for the period of inundation only. <br />
	Data analysis: [[NCANALYSE]].		Data analysis: [[NCANALYSE]].

	====Mean Salinity Ebb Current====		====Mean Salinity Ebb Current====

imported>Lang Guenther: /* Advective Salt Transport, Flood-Ebb-Ratio */ new ratios added which are only computed from exact transport data

2017-01-02T10:39:19Z

Advective Salt Transport, Flood-Ebb-Ratio: new ratios added which are only computed from exact transport data

@@ Line 137: / Line 137: @@
 ====Advective Salt Transport, Flood-Ebb-Ratio====
 flood to ebb ratio for the salt volumes which are transported by means of flood and ebb currents.<br />
 [[Example: Flood-Ebb-Ratio for the Advective Salt Transport in the Inner Außenweser]]. <br />
 Data analysis: [[TDKSF]].
 ====Mean Salinity Flood Current : Mean Salinity====

imported>Lang Guenther: /* Diffusive Residual Transport of Salt */ advective tidal transport of salt added

2017-01-02T10:31:37Z

Diffusive Residual Transport of Salt: advective tidal transport of salt added

← Older revision		Revision as of 10:31, 2 January 2017
Line 125:		Line 125:
	=====Computed from integral (salt) volume transport=====		=====Computed from integral (salt) volume transport=====
	Residual based on exact volume of salt (with exception of roundoff) which passes a certain cross section during a tidal cycle (flood current plus ebb current) due to diffusion. This quantity makes use of the normal flow of salt only, which is orthogonal to the flow face. Reconstruction of the total vector by means of projection is left to visualization programs (e. g. [[NCPLOT]]). <br />		Residual based on exact volume of salt (with exception of roundoff) which passes a certain cross section during a tidal cycle (flood current plus ebb current) due to diffusion. This quantity makes use of the normal flow of salt only, which is orthogonal to the flow face. Reconstruction of the total vector by means of projection is left to visualization programs (e. g. [[NCPLOT]]). <br />
			Data analysis: [[NCANALYSE]].

			====Advective Tidal Transport of Salt====
			total salt volume which is transported by means of advection during ebb and flood current through a cross section (the different transport directions are taken into account). Magnitudes for flood and ebb current transport are added.<br />
			=====Computed from synoptic current velocity and synoptic salinity=====
			Not computed by program [[TDKSF]].
			=====Computed from integral (salt) volume transport=====
			Sum of individual transports (magnitudes) based on exact volume of salt (with exception of roundoff) which passes a certain cross section during a tidal cycle (flood current plus ebb current) due to advection. This quantity makes use of the normal flow of salt only, which is orthogonal to the flow face. <br />
	Data analysis: [[NCANALYSE]].		Data analysis: [[NCANALYSE]].

imported>Lang Guenther: /* Advective Residual Transport of Salt */ quantities added which are derived from integral transport data

2017-01-02T10:25:32Z

Advective Residual Transport of Salt: quantities added which are derived from integral transport data

← Older revision		Revision as of 10:25, 2 January 2017
Line 112:		Line 112:
	====Advective Residual Transport of Salt====		====Advective Residual Transport of Salt====
	residual salt volume which is transported by means of ebb and flood currents through a cross section (the different transport directions are taken into account). If the advective transport by means of flood current is equal but in opposite direction of the ebb current transport this will result in a zero advective residual transport of salt.<br />		residual salt volume which is transported by means of ebb and flood currents through a cross section (the different transport directions are taken into account). If the advective transport by means of flood current is equal but in opposite direction of the ebb current transport this will result in a zero advective residual transport of salt.<br />
			=====Computed from synoptic current velocity and synoptic salinity=====
	[[Example: Advective Residual Transport of Salt in the Inner Außenweser]]. <br />		[[Example: Advective Residual Transport of Salt in the Inner Außenweser]]. <br />
	Data analysis: [[TDKSF]].		Data analysis: [[TDKSF]].
			=====Computed from integral (salt) volume transport=====
			Residual based on exact volume of salt (with exception of roundoff) which passes a certain cross section during a tidal cycle (flood current plus ebb current) due to advection. This quantity makes use of the normal flow of salt only, which is orthogonal to the flow face. Reconstruction of the total vector by means of projection is left to visualization programs (e. g. [[NCPLOT]]). <br />
			Data analysis: [[NCANALYSE]].

			====Diffusive Residual Transport of Salt====
			residual salt volume which is transported by means of diffusion during ebb and flood current through a cross section (the different transport directions are taken into account). If the diffusive transport for each of the tidal phases is equal but in opposite direction this will result in a zero diffusive residual transport of salt.<br />
			=====Computed from synoptic current velocity and synoptic salinity=====
			Not computed by program [[TDKSF]].
			=====Computed from integral (salt) volume transport=====
			Residual based on exact volume of salt (with exception of roundoff) which passes a certain cross section during a tidal cycle (flood current plus ebb current) due to diffusion. This quantity makes use of the normal flow of salt only, which is orthogonal to the flow face. Reconstruction of the total vector by means of projection is left to visualization programs (e. g. [[NCPLOT]]). <br />
			Data analysis: [[NCANALYSE]].

	====Advective Salt Transport, Flood-Ebb-Ratio====		====Advective Salt Transport, Flood-Ebb-Ratio====

imported>Lang Guenther: /* Ebb Current */ new quantities computed from exact transport added

2017-01-02T10:06:44Z

Ebb Current: new quantities computed from exact transport added

@@ Line 54: / Line 54: @@
 ====Advective Ebb Transport of Salt====
 salt volume, which is transported by means of ebb current through a cross section.<br />
 [[Example: Advective Ebb Transport of Salt in the Inner Außenweser]]. <br />
 Data analysis: [[TDKSF]].
 ====Mean Salinity Ebb Current====

imported>Lang Guenther: /* Flood Current */ Erweiterungen Transporte aus NCANALYSE

2017-01-02T10:00:11Z

Flood Current: Erweiterungen Transporte aus NCANALYSE

@@ Line 17: / Line 17: @@
 ====Advective Flood Transport of Salt====
 salt volume, which is transported by means of flood current through a cross section.<br />
 [[Example: Advective Flood Transport of Salt in the Inner Außenweser]]. <br />
 Data analysis: [[TDKSF]].
 ====Mean Salinity Flood Current====