Papers discussing artificial ocean cooling to weaken tropical cyclones are published. Cooling sea surface temperatures by 2.5ºC would weaken and reduce the damage of a tropical cyclone but lack a practical method. This is a cost and logistic capable autonomous solution.

The ocean thermocline provides a source of cold water. Storm waves provide energy. A modular column of sealed cells, with check valves, would use the oscillations of the waves to draw cold water from below to cool the warm surface.

Each cell is a cylinder, made of marine textile, with a Soft Multiple Segment One-way Screen at the base and open at the top. The SMSOS opens on decent, allowing water into the cylinder. The SMSOS closes on ascent and the contained water would be lifted up. Add more cells, end to end, and this Deep Water Drawing Column would utilize repeated oscillations up and down, to pull water from the lower to the top cell. See fig 1.

The SMSOS is 2 layers of marine textile on top of a fine mesh base. The upper layer is larger in diameter than the mid. Both layers have segmented openings, staggered from each other and circumferential sewn together with the base mesh. A positive pressure from below would parachute layers, opening it. A positive pressure from above collapses layers and closes it. The cells are connected by overlapping joints. Castellated loops sewn onto the cell, above and below the SMSOS, connect with a split ring hoop to similar loops, on next cell open end. The hoops are made of dense, rigid material to support and weigh the column.

The column is hundreds of meters long and would be prone to collapsing, twisting or kinking. To prevent that, a secondary weight is added to the bottom of the column, and a buoy to the top.

The buoy is an inflatable cylinder, oriented vertically and bound to top cell. Abrupt changes in direction are dampened due to gradual increase in displacement.

The secondary weight is bound to bottom cell and directly tethered to buoy by internal rope. The tether is routed internally and pass each SMSOS centre through grommets.

The buoy is a highly contrasting colour, and will have an instrument package on top. The package includes a regulated inflation cylinder, safety-discharge valve, locating beacon, anti-collision light and battery pack. The DWDC is stored and transported deflated and collapsed for convenience. A small inflation cylinder is activated on deployment and regulated to safe working pressure. The safety-discharge valve is held closed electrically and spring loaded to prevent over-pressure of buoy. The locating beacon and anti-collision light are provided for recovery and navigation safety. The battery pack will have enough capacity for recovery of DWDC.

A fleet of DWDC'S are deployed ahead of storm by boat or aircraft. Recovery is by commercial fishing boat or similar with boom winch. Battery removal deflates buoy, and tether is winched up, collapsing column into compact unit. Unrecoverable DWDC'S would sink to bottom when battery discharges.